Engineering Activities for Kids: 10 Hands-On STEM Projects

By the Ozobot Education Team — STEM curriculum specialists

Quick answer: Engineering activities differ from crafts because they present a problem with real criteria and constraints instead of one predetermined result — students design a solution, test it, and improve it based on what fails. Below are 10 age-graded engineering challenges for PreK through grade 8, covering structures, machines, robotics, and real-world problem-solving, most with an optional Ozobot coding extension.

The best engineering activities for kids present a problem with more than one possible solution. Students use available materials to design, build, test, and improve a bridge, machine, structure, robot, or other invention that meets a specific goal.

Unlike a craft with one set of instructions, an engineering challenge asks students to make decisions. A design may not work on the first attempt—and that is part of the learning process. Each test provides information students can use to make their next design stronger, faster, safer, or more efficient.

This post is Part 3 of our STEM Activities series. For the full age-by-grade overview of hands-on projects, see our pillar guide, 18 Best STEM Activities for Kids by Grade (PreK–8th Grade).

What Is an Engineering Activity?

An engineering activity challenges students to develop a solution to a problem while working within specific requirements.

Those requirements usually include:

• Criteria: What the solution must accomplish
• Constraints: Limits involving materials, time, size, weight, or cost
• Testing: A way to determine whether the design works
• Iteration: Improving the design based on its test results

For example, asking students to build any bridge is a building activity. Asking them to build a paper bridge that spans 12 inches and supports 20 coins using only one sheet of paper creates an engineering challenge.

The Next Generation Science Standards encourage students to define problems, consider criteria and constraints, compare possible solutions, and test designs to identify areas for improvement. Next Generation Science Standards

What Are the Steps of the Engineering Design Process?

The engineering design process is a flexible series of steps engineers use to solve problems:

1. Ask: What problem needs to be solved?
2. Research: What information could help?
3. Imagine: What are some possible solutions?
4. Plan: Which idea will be built, and what materials are needed?
5. Create: Build a model or prototype.
6. Test: Determine how well the design meets the goal.
7. Improve: Make changes based on the results.
8. Share: Explain the solution and what was learned.

Students may move between these steps several times. Testing can reveal a new problem, and an improved design may need to be tested again. NASA describes engineering design as a process of identifying a problem, designing and building a solution, testing it, and improving the design. NASA/JPL Engineering Design Process

Engineering Activities for Kids at a Glance

1. Build the Tallest Paper Tower

The Challenge

Build the tallest freestanding tower possible using a limited amount of paper and tape.

Materials

• Paper
• Tape
• Scissors
• Ruler or measuring tape

Criteria and Constraints

The tower must stand without being held for at least 10 seconds. Limit each student or team to the same number of sheets of paper and amount of tape.

What Students Do

Students can experiment with folding, rolling, or layering the paper to create different structural shapes. After the first test, ask them to identify where the tower bent, leaned, or collapsed.

Give students time to rebuild and compare the height and stability of the original and improved designs.

What Students Learn

This activity introduces structural engineering, stability, weight distribution, and the importance of a strong base. It also shows how changing the shape of a material can change its strength.

2. Construct a Strong Paper Bridge

The Challenge

Design a bridge that spans a set distance and supports as much weight as possible.

Materials

• Identical sheets of paper
• Two stacks of books or blocks
• Tape, if permitted
• Coins or small classroom weights
• Ruler

Criteria and Constraints

The bridge must cross the entire gap without supports underneath it. Every team should receive the same paper, bridge span, and testing weights.

What Students Do

Students may test flat, folded, rolled, layered, or arched paper designs. Add weights one at a time until the bridge bends or collapses.

After the first trial, students should record the bridge's maximum load, identify its failure point, and improve the design.

What Students Learn

Students explore compression, tension, load distribution, structural shapes, and fair testing. Encourage them to compare multiple solutions rather than only focusing on which bridge held the most weight.

3. Design a Cardboard Marble Run

The Challenge

Build a track that carries a marble from a starting point to a target without the marble falling off.

Materials

• Cardboard
• Paper tubes
• Tape
• Scissors
• Marble or small ball
• Collection cup

Criteria and Constraints

The marble must remain on the track and reach the collection cup. Add constraints such as a minimum track length, a required turn, or a set number of materials.

What Students Do

Students sketch their track before building. They test the marble run, observe where the marble slows down or leaves the track, and adjust its slope, walls, curves, or supports.

More advanced students can design for a specific travel time or include multiple possible routes.

What Students Learn

This engineering project introduces gravity, potential and kinetic energy, slope, speed, and cause and effect. Students also practice isolating one change at a time during testing.

In an upcoming blog about fun math activities, you'll learn more about hands-on ways to build the measuring, timing, and prediction skills that a challenge like this calls for.

4. Balance a Seesaw

The Challenge

Arrange objects of different weights so a seesaw remains balanced.

Materials

• A simple seesaw or lever
• Small objects or weights
• Ruler
• Data sheet

Criteria and Constraints

The seesaw should remain approximately level without anyone holding it. Students must use the provided objects and may only change their positions.

What Students Do

Begin with equal weights placed at equal distances from the fulcrum. Students can then investigate:

• Equal weights at different distances
• Different weights at equal distances
• Different weights at different distances
• Multiple objects on each side

Students record the combinations that balance and use the patterns to predict new solutions. See 10 Easy Science Experiments for Kids at Home or School for more on turning an activity like this one into a fair test with a single changed variable and recorded data.

What Students Learn

A seesaw is a lever, one of the basic types of simple machines. Students learn how weight, distance, force, and the location of a fulcrum affect balance.

Ozobot Connection

The Ozo Goes on a Seesaw STEAM Kit combines hands-on engineering with robotics as students explore levers, motion, balance, and weight distribution.

5. Build an Earthquake-Resistant Structure

The Challenge

Construct a structure that remains standing during a simulated earthquake.

Materials

• Craft sticks
• Straws
• Index cards
• Tape
• String
• Cardboard base
• Tray or shake table

Criteria and Constraints

The structure must reach a minimum height and remain attached to its base. Limit the materials, building time, or total structure weight.

What Students Do

Students build a structure and test it by gently shaking its base for a consistent amount of time. They observe which parts bend, separate, or collapse.

Teams can investigate improvements such as:

• A wider base
• Cross-bracing
• Triangular supports
• Flexible joints
• A lower center of gravity

Use the same testing procedure for every structure so students can compare the results fairly.

What Students Learn

This challenge introduces structural engineering, vibration, stability, bracing, material strength, and tradeoffs between height and durability.

6. Engineer an Ozobot Crawler Carrier

The Challenge

Design a carrier that allows the Ozobot Crawler to transport an object without dropping it.

Materials

• Ozobot Crawler
• Compatible Ozobot robot
• Cardboard
• Paper
• Tape
• Craft materials
• Small object to transport

Criteria and Constraints

The carrier must remain attached while the Crawler travels a set distance. Establish a size or material limit and select an object every design must transport.

What Students Do

Students determine where the load should be placed and how it can be secured without interfering with the robot's movement.

During testing, they observe:

• Whether the carrier stays attached
• Whether the load shifts or falls
• Whether the design affects movement
• Whether the robot can turn
• How much weight the carrier can transport

Students use the results to adjust the carrier's shape, balance, size, or attachment method.

What Students Learn

This project introduces transportation engineering, load distribution, prototyping, stability, and the relationship between a robot and an attached mechanical system.

7. Program a Robot Delivery System

The Challenge

Program a robot to collect or deliver an object while traveling between specific locations.

Materials

• Ari or Evo
• Ozobot Editor or Color Code materials
• Delivery object
• Classroom map or student-designed route
• Obstacles or checkpoints

Criteria and Constraints

The robot must begin at a designated location, visit required checkpoints, deliver the object, and reach the finish without leaving the route.

Possible constraints include:

• A maximum number of coding blocks
• A required delivery order
• A time limit
• A limited number of turns
• A fragile object that cannot fall

What Students Do

Students map the route, create the program, run a test, and document any errors. They then revise the code or physical delivery system to improve reliability and efficiency.

What Students Learn

This challenge combines robotics engineering, algorithms, transportation, automation, sequencing, and debugging. Students also begin considering how real delivery robots must respond to people, obstacles, changing routes, and safety requirements.

8. Design a Robot Obstacle Course

The Challenge

Create and program a robot to complete a course containing turns, barriers, checkpoints, and other requirements.

Materials

• Ari or Evo
• Ozobot Editor or Color Codes
• Paper
• Tape
• Blocks or classroom objects
• Timer

Criteria and Constraints

The robot must complete the course without touching specified obstacles. Students may also need to stop at a checkpoint, change speed, activate lights, or perform a movement before finishing.

What Students Do

Teams can first design courses for themselves and then exchange courses with another team. Students plan, program, test, and debug their solution.

To make the activity more advanced, require students to optimize for:

• Fastest completion time
• Shortest route
• Fewest coding blocks
• Greatest consistency across several trials

What Students Learn

Students practice spatial reasoning, programming, sensor awareness, iterative testing, and optimization. They also learn that the fastest solution is not always the most reliable or efficient.

9. Invent an Assistive Device

The Challenge

Design a tool that helps a person complete an everyday task more safely or independently.

Materials

• Cardboard
• Paper
• String
• Craft sticks
• Tape
• Recycled materials
• Scissors

Criteria and Constraints

Begin by identifying a specific user and task. The device should be safe, comfortable, easy to understand, and constructed from available materials.

Possible challenges include designing a device that helps someone:

• Reach an object
• Hold a pencil
• Turn a page
• Carry classroom materials
• Open a container
• Organize small objects
• Receive a visual or sound reminder

What Students Do

Students should learn about the intended user before creating a solution. They sketch several ideas, select one based on the criteria, construct a prototype, and gather feedback.

After testing, students revise the design based on how well it serves the user—not simply how creative it looks.

What Students Learn

This activity introduces human-centered engineering, accessibility, empathy, prototyping, and user feedback. It helps students recognize that successful designs begin with understanding people's actual needs.

10. Solve a Problem at School or in the Community

The Challenge

Identify a real problem and develop a model or prototype of a possible solution.

Possible Problems

Students might investigate how to:

• Reduce classroom waste
• Organize shared supplies
• Conserve water
• Improve school accessibility
• Make pickup and drop-off safer
• Protect classroom technology
• Reduce energy use
• Create a more efficient recycling system

Criteria and Constraints

Students define the requirements based on the problem. Their design may need to meet limits involving cost, available space, safety, environmental impact, or ease of use.

What Students Do

Students:

1. Define the problem.
2. Interview or survey affected users.
3. Research existing solutions.
4. Establish criteria and constraints.
5. Generate multiple ideas.
6. Select and build a prototype.
7. Test the design or gather feedback.
8. Recommend improvements.
9. Present the final solution.

What Students Learn

This project allows students to apply engineering to a meaningful need. Middle school engineering standards emphasize defining precise criteria and constraints, evaluating competing solutions, and modifying designs based on test results. Middle School Engineering Design Standards

How Do You Make an Engineering Activity Age-Appropriate?

The same challenge can often be adapted for different ages by changing its materials, constraints, measurements, and level of independence.

PreK–Kindergarten

Focus on building, exploring materials, and describing what happened. Use large, simple materials and visible tests.

Grades 1–2

Introduce one clear goal and one or two constraints. Ask students to draw their ideas and make a simple improvement after testing.

Grades 3–5

Require students to define criteria, compare designs, measure results, control testing conditions, and document revisions.

Grades 6–8

Introduce multiple constraints, budgets, data analysis, user feedback, competing solutions, environmental impact, and formal presentations.

If you're also choosing a coding robot or classroom kit to support challenges like these, an upcoming blog about choosing the best STEM kit will break down what to look for at each age and grade band.

How Can Teachers Evaluate an Engineering Project?

An engineering project should not be graded only on whether the final design worked. A failed prototype may show excellent planning, testing, analysis, and improvement.

Consider evaluating:

• Understanding of the problem
• Use of criteria and constraints
• Quality of the initial plan
• Appropriate use of materials
• Testing procedure
• Data and observations
• Evidence-based revisions
• Teamwork and communication
• Explanation of design decisions
• Reflection on future improvements

Students should be able to explain what they tried, what happened, why they made changes, and what they would test next.

Frequently Asked Questions About Engineering Activities for Kids

What are some easy engineering activities for kids? Easy engineering activities include building a paper tower, constructing a bridge, designing a marble run, balancing a seesaw, and building a carrier that transports an object.

What is the difference between science and engineering? Science investigates how the natural world works. Engineering uses scientific, mathematical, and technical knowledge to design solutions to problems. The two fields frequently overlap.

What is the difference between an engineering project and a craft? A craft usually follows directions to create a predetermined result. An engineering project presents a problem, criteria, and constraints while allowing students to develop and test different solutions.

What materials can children use for engineering projects? Useful materials include paper, cardboard, tape, craft sticks, straws, string, paper tubes, recycled containers, building blocks, classroom weights, and coding robots.

Can coding be part of an engineering activity? Yes. Students can program robots, build automated systems, design navigation routes, test sensors, or use code to control movement, lights, sounds, and decision-making.

Why is failure important in engineering? An unsuccessful test reveals where a design has difficulty meeting its goal. Engineers use that information to revise the design and improve its performance.

How does robotics teach engineering? Robotics combines mechanical design, electronics, programming, testing, and problem-solving. Students can immediately observe how their design and coding decisions affect a robot's behavior.

Help Students Think Like Engineers

Engineering activities give children permission to experiment, make mistakes, change direction, and try again.

Whether students are building a paper tower or programming a robotic delivery system, they are learning to define problems, make thoughtful design decisions, test their ideas, and use evidence to improve a solution.

Explore Ozobot coding robots, STEAM Kits, the Ozobot Crawler, and classroom lessons to bring hands-on engineering and robotics challenges into your classroom.

This is Part 3 of our STEM Activities series. New guides post weekly — check back soon, or explore what's live so far below.

Continue Exploring STEM Activities

• 18 Best STEM Activities for Kids by Age (PreK–8) — An age-graded overview of activities across every stage from preschool through middle school.
• 10 Easy Science Experiments for Kids at Home or School — Testable science questions kids can investigate with everyday materials.

(more guides coming soon)

• 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.