18 Best STEM Activities for Kids by Grade (PreK–8th Grade)

By the Ozobot Education Team — STEM curriculum specialists

Quick answer: The best STEM activities for kids match their developmental stage: preschoolers and kindergarteners learn through shape-tracing, color patterns, and simple building; grades 1–2 tackle short sequencing and coding challenges; grades 3–5 take on multistep engineering and data-based projects; and grades 6–8 handle longer, more independent challenges involving debugging, functions, and even AI. Below are 18 age-graded activities — screen-free and coding-based — organized by grade band, from PreK through grade 8.

The best STEM activities for kids are hands-on, age-appropriate, and connected to concepts children already understand. Younger learners benefit from activities involving colors, patterns, movement, and simple building, while older students can take on coding challenges, engineering projects, experiments, and real-world problem-solving.

Whether you are a teacher planning a classroom lesson or a parent looking for an educational activity at home, choosing a project that matches a child's developmental level can make STEM learning more engaging—and much less intimidating.

What Is a STEM Activity?

A STEM activity combines one or more areas of science, technology, engineering, and mathematics. Rather than simply reading about a concept, children investigate a question, test an idea, build something, write a program, or solve a problem.

Many STEM activities also incorporate art, creativity, and design. This expanded approach is often called STEAM: science, technology, engineering, art, and mathematics.

Effective STEM activities encourage children to:

• Ask questions Make predictions
• Test different solutions
• Recognize patterns
• Learn through trial and error
• Explain how they reached an answer
• Collaborate with other students
• Apply their learning to a real-world problem

A STEM activity does not need to involve complicated equipment. Paper, markers, blocks, recycled materials, household objects, or a classroom coding robot can all become tools for meaningful STEM learning. In an upcoming blog about easy science experiments, you'll learn more about activities built specifically around a testable question and a controlled variable, each paired with an optional Ozobot coding extension

STEM Activities for Preschool and Kindergarten

The best STEM activities for preschoolers and kindergarteners introduce foundational concepts through play, observation, movement, and exploration. Activities should be short, visual, and flexible enough to allow children to experiment.

1. Build a Stronger Bridge

Give children blocks, craft sticks, paper cups, or other classroom materials and ask them to build a bridge between two objects. Test the bridge by adding small toys or classroom items one at a time.

This activity introduces:

• Basic engineering
• Balance and stability
• Comparing weight
• Testing and improving a design

Instead of focusing on whether the bridge works the first time, ask children what they could change to make it stronger. In an upcoming blog about hands-on engineering projects, you'll learn more about age-graded design challenges with clear criteria and constraints, from paper towers through earthquake-resistant structures.

Ozobot version — Bridge Crossing: After the bridge is built, add a coding layer. Kids draw a black marker line and Color Codes leading up to and across the bridge, then run Ozobot along it. Now "stronger" also means "flat and stable enough for a robot to cross without losing the line" — a concrete new design constraint kids can test and fix.

2. Trace Shapes With Evo

Have students identify and trace a circle, square, and triangle before placing Evo on the completed lines. Students can watch Evo follow each shape and respond to the Color Codes by changing speeds and performing different moves.

This activity introduces:

• Shape recognition
• Fine motor skills
• Colors and patterns
• Cause and effect
• Screen-free coding

Encourage students to name each shape and describe how Evo’s movement changes when it reads the different Color Codes.

3. Color Code a Snowman

Have students design a snowman using black lines and Color Codes for Evo to follow. After testing their snowman paths, students can make adjustments and watch how those changes affect Evo’s movements.

This activity introduces:

• Basic coding
• Colors and patterns
• Robotics concepts
• Art and creative design
• Testing and improving a design

Encourage students to share their finished snowmen and explain the changes they made to help Evo complete the path.

4. Design a Gingerbread House for Evo

Have students draw a gingerbread house using black lines and Color Codes, then place Evo on the design to explore the house. Students can test their paths and adjust the design or programming to help Evo move through the house successfully.

This activity introduces:

• Creative design
• Basic engineering
• Robotics concepts
• Problem-solving
• Screen-free coding

Encourage students to share their gingerbread houses and explain how their changes helped Evo follow the paths.

STEM Activities for Grades 1–2

Students in first and second grade are ready to follow multistep directions, record simple observations, and compare possible solutions. Activities can begin introducing more structured challenges while preserving plenty of room for creativity.

1. Help Ozobot Get to School

Ozobot is late for school and needs help finding the fastest route without stopping at distractions like the playground, candy store, or arcade. Have students use direction, speed, and Win/Exit Color Codes to program Ozobot’s path and safely guide it from home to school.

This activity introduces:

• Sequencing and algorithms
• Directional thinking
• Problem-solving
• Decision-making
• Screen-free coding

Ask students which Color Codes they used most often and how their choices helped Ozobot reach school.

2. Follow the Rainbow With Evo

Have students use Ozobot Blockly to program Evo to travel along a curved rainbow and reach the pot of gold. Students place movement commands inside a loop, test their program, and troubleshoot the code if Evo moves off the rainbow.

This activity introduces:

• Sequences and loops
• Movement commands
• Algorithmic thinking
• Testing and troubleshooting
• Block-based coding

Encourage students to add rainbow lights or a celebratory movement to Evo’s program when it reaches the pot of gold.

3. Recreate a Constellation With Evo

Have students select a constellation, plot its stars, and draw a connected path for Evo to follow. Students add at least three Color Codes, test the constellation map, and debug any areas that prevent Evo from reaching every star.

This activity introduces:

• Stars and constellations
• Planning and sequencing
• Creative design
• Testing and debugging
• Screen-free coding

Ask students to present their constellation and explain the programming choices they made.

4. Code a Story’s Plot With Evo

After reading a familiar story, have students identify its most important events and arrange them in sequential order. Students create a plot diagram for Evo to follow and use Color Codes to represent the characters’ actions or emotions at different moments in the story.

This activity introduces:

• Story sequencing
• Plot and story elements
• Symbolic thinking
• Collaboration
• Screen-free coding

Ask students to narrate the story as Evo travels through the plot and explain why they selected each Color Code.

STEM Activities for Grades 3–5

Upper-elementary students can work with more complex instructions, collect data, identify variables, and improve a design through multiple rounds of testing. They are also ready to begin connecting STEM activities to real-world careers and challenges.

1. Design an Innovation With Ozobot

Introduce students to young innovator Gitanjali Rao, TIME's first-ever Kid of the Year, and the ways she uses science and technology to solve real-world problems. Students program Ozobot to travel through the seven steps of the engineering design process before brainstorming an innovation of their own.

This activity introduces:

• The engineering design process
• Research and critical thinking
• Real-world problem-solving
• Sequences and directionality
• Block-based coding

Ask students to present their innovation and explain the problem it is designed to solve.

2. Program a Moon Landing With Ozobot

Teach students about Katherine Johnson, the NASA mathematician whose calculations helped send astronauts to the Moon. Students use point-counter Color Codes and addition and subtraction to program Ozobot's spaceship, keeping its score above zero until it successfully lands on the Moon.

This activity introduces:

• Katherine Johnson’s contributions to NASA
• Addition and subtraction
• Sequencing and directionality
• Logical problem-solving
• Screen-free coding

Ask students to explain how they calculated the correct point total for each stage of Ozobot’s journey.

3. Guide LeapBot Across the Pond

Have students use Ozobot Blockly to program LeapBot to travel across a pond by leaping over green lily pads and swimming through blue water. Evo uses its color sensors to change its lights and behavior before stopping when it reaches the black rock.

This activity introduces:

• Conditional statements
• Loops and sequences
• Color sensors and LED commands
• Testing and debugging
• Block-based coding

Challenge students to design a new path that LeapBot can successfully follow from one line to the next.

4. Build an Ozo-Bug Zoo Exhibit

Challenge students to design a zoo exhibit containing the food, water, shelter, and space a ladybug needs to survive. Students then create and program a Color Code path for their ladybug-themed Ozobot to travel through the completed habitat.

This activity introduces:

• Animal habitats and basic needs
• Engineering and design
• Environmental science
• Creative problem-solving
• Screen-free coding

Ask students to explain how each feature of their exhibit supports the ladybug’s survival.

5. Play the Ozobot Blockout Math Game

In this two-player game, Evo acts as a pair of dice by generating two numbers between one and six. Students multiply the numbers, draw a rectangle with those dimensions on a grid, and calculate its area before adding the points to their running total.

This activity introduces:

• Multiplication facts
• Area and rectangles
• Mental addition
• Spatial reasoning
• Strategic thinking

Ask students to explain how the placement and orientation of each rectangle affected their strategy. In an upcoming blog about fun math activities, you'll learn more about pairing number-sense skills with hands-on and robot-assisted activities, from PreK counting through middle school probability.

STEM Activities for Grades 6–8

Middle school students are ready for longer projects that involve research, data analysis, competing constraints, and more independent decision-making. STEM challenges at this age should offer multiple possible solutions rather than one predetermined answer.

1. Find and Fix the Bugs

Have students analyze an intentionally flawed Ozobot Blockly program and identify the five errors preventing Evo from moving correctly inside a student-designed bug drawing. After repairing and documenting the code, students create their own bugged program for a classmate to troubleshoot.

This activity introduces:

• Testing and debugging
• Conditional logic
• Program documentation
• Code analysis
• Peer collaboration

Ask students to explain each error they found, how it affected Evo’s behavior, and what change corrected it.

2. Program an Ozobot Pop Star Performance

Have students create three signature dance moves using functions in Ozobot Blockly, then call those reusable functions throughout a complete concert program. Students can combine movement, lights, sounds, and timing commands to choreograph Ozobot’s performance to a favorite song.

This activity introduces:

• Functions and function calls
• Reusable and organized code
• Movement, light, and sound commands
• Creative programming
• Block-based coding

Ask classmates to watch the finished performance and identify each of the three signature dance moves.

3. Make Decisions With Computer Vision

Note: Some school districts currently restrict student-facing generative AI tools for these grade levels — check your school or district's current AI policy before planning this activity.

Have students position two possible targets at the ends of a T-shaped track and connect a camera to the Ozobot Editor. Students write a program that asks an LLM to analyze what the camera sees and direct Ari or Evo toward the correct target.

This activity introduces:

• Artificial intelligence and computer vision
• Large language models
• Prompt engineering
• Conditional decision-making
• Testing and troubleshooting

Ask students to explain the roles the camera, LLM, and code each played in helping the robot choose a direction.

4. Become a Digital Zoologist

Note: Some school districts currently restrict student-facing generative AI tools for these grade levels — check your school or district's current AI policy before planning this activity.

Have students use an LLM to research animals by asking questions that produce text, number, and true-or-false answers. Students store the responses in variables, use conditional logic to control Ari or Evo’s behavior, and record their findings in a zoologist field report.

This activity introduces:

• AI-assisted research
• Data types and variables
• Conditional logic
• Data collection and documentation
• Evaluating AI-generated information

Ask students to identify which LLM responses were accurate and discuss why AI-generated research should be verified.

5. Explore the Euclidean Algorithm With Evo

Have students use an Ozobot Blockly program and an Ozomap to calculate the greatest common divisor of different pairs of positive integers. By recording Evo’s dividend, divisor, quotient, and remainder during each iteration, students uncover how the Euclidean algorithm works and apply the pattern to new problems.

This activity introduces:

• Greatest common divisors
• Division and remainders
• Iterative algorithms
• Mathematical pattern recognition
• Computational thinking

Challenge students to calculate a greatest common divisor independently and then use Evo to check their answer.

How Do You Choose an Age-Appropriate STEM Activity?

Choose an activity that is challenging enough to encourage problem-solving but not so complicated that the instructions become the main obstacle.

Consider the following factors:

Learning objective

Decide what children should understand or practice. The goal might be learning about patterns, measuring distance, writing a sequence, analyzing data, or improving an engineering design.

Reading and motor skills

Young children may need visual instructions, larger materials, and adult assistance. Older students can manage written directions, smaller components, and more independent research.

Time available

A successful STEM activity can take 15 minutes or several weeks. Make sure the scope matches the time available, including setup, testing, discussion, and cleanup.

Room for experimentation

The activity should allow children to make choices, test ideas, and revise their work. If every step and outcome is predetermined, students have fewer opportunities to practice genuine problem-solving.

Connection to students’ interests

Sports, space, animals, art, stories, games, and environmental issues can all become entry points into STEM. A familiar theme can make an unfamiliar concept feel much more approachable.

If you're also choosing a coding robot or classroom kit rather than a single activity, an upcoming blog about choosing the best STEM kit will break down what to look for at each age and grade band, including how to decide between Ozobot's Evo and Ari.

How Can STEM Activities Support Different Learners?

STEM activities can provide multiple ways for students to participate and demonstrate their understanding. One student might build a model, another might write the code, and another might record data or explain the group’s reasoning.

Teachers can make activities more accessible by:

• Providing visual and written instructions
• Modeling one example before students begin
• Breaking a larger challenge into smaller steps
• Offering different materials or methods
• Assigning flexible group roles
• Allowing students to draw, build, speak, or write their responses
• Including optional extensions for students who are ready for more complexity

Open-ended challenges are especially useful because students can work toward the same learning objective at different levels of difficulty.

Why Are Hands-On STEM Activities Important?

Hands-on STEM activities help children understand that science, technology, engineering, and mathematics are connected ways of investigating and solving problems.

They also help students develop transferable skills such as:

• Critical thinking
• Creativity
• Communication
• Collaboration
• Persistence
• Digital literacy
• Confidence with problem-solving

Most importantly, students learn that an unsuccessful first attempt is not necessarily a failure. It is information they can use to improve the next solution.

Frequently Asked Questions About STEM Activities for Kids

What are the four areas of STEM? STEM stands for science, technology, engineering, and mathematics. Activities may focus primarily on one area or combine several disciplines in a single project.

What is the difference between STEM and STEAM? STEAM adds art to science, technology, engineering, and mathematics. The art component can include visual design, storytelling, music, creative construction, or other forms of expression.

What are some easy STEM activities for kids? Easy STEM activities include building a paper tower, testing which objects sink or float, creating color patterns, designing a maze, measuring how far objects travel, and building a bridge from classroom materials.

Can coding be taught without a computer? Yes. Children can learn sequencing, patterns, algorithms, debugging, and cause and effect through screen-free coding activities. They can give directions to a classmate, arrange instruction cards, draw coded paths, or use a robot that responds to colors and lines.

At what age can children begin learning STEM? Children can begin exploring STEM concepts in preschool through sorting, stacking, building, observing nature, creating patterns, and asking questions. The vocabulary and complexity can grow as their reasoning, reading, and motor skills develop.

How can teachers use robotics in different subjects? Robotics can be integrated into mathematics, science, language arts, social studies, and art. Students might program a robot to demonstrate a math answer, model a scientific process, travel through a story sequence, follow a historical route, or complete a student-designed work of art.

Final Thoughts

The best STEM activities give children an active role in learning. Instead of only receiving information, students ask questions, make decisions, test solutions, and explain what they discovered.

The materials and complexity may change as children grow, but the central process remains the same: identify a problem, explore an idea, learn from the result, and try again. Whether that means testing a hypothesis, building and improving a design, choosing the right kit, or building number sense with hands-on math, the rest of this series digs deeper into each piece of that process.

Explore Ozobot's coding robots, STEAM Kits, activity mats, and classroom resources to bring hands-on STEM learning to students at every stage.

This is Part 1 of our STEM Activities series. New guides post weekly — check back soon, or explore what's live so far below.

Continue Exploring STEM Activities

• 10 Easy Science Experiments for Kids at Home or School — Testable science questions kids can investigate with everyday materials.
• Engineering Activities for Kids: 10 Hands-On STEM Projects — Design challenges that ask kids to build, test, and improve a solution.
• How to Choose the Best STEM Kit for Kids by Age — A buying guide for matching a STEM kit to a child's age and learning goals.
• 10 Fun Math Activities for Kids by Grade — Hands-on ways to build number sense from counting through algebra.