Free STEM Projects for Kids

Browse beginner-friendly engineering projects, science experiments, coding projects, circuits, and classroom activities for parents, students, and educators.

What Is a STEM Project?

A STEM project is a hands-on activity where kids design, build…

A STEM project is a hands-on activity where kids design, build, test, or investigate something themselves, instead of just reading about how it works. Science, technology, engineering, and math show up together: a bridge build uses engineering and math, a quiz game uses coding and logic, and a kitchen experiment uses the scientific method from start to finish.

The best beginner STEM projects give kids a clear goal, like building a bridge that holds weight, writing a program that asks questions, or growing crystals overnight. Then they can test their first attempt, see what happens, and improve it.

Want a structured plan instead? Browse our free curriculum paths or find an in-person STEM workshop near you.

engineering

Popsicle Stick Truss Bridge

Build a popsicle stick truss bridge with Warren truss triangles, then load test it to see compression and tension in action.

Easy · 1-2 hours

robotics

LEGO SPIKE Prime Super Cleanup Robot Guide

Build a LEGO SPIKE Prime Super Cleanup-style grabber robot, then program, troubleshoot, and test how well it picks up different objects.

Medium · 2-3 hours

engineering

Simple Circuit Light

Build a real breadboard LED circuit with a resistor, jumper wires, and a small battery pack.

Medium · 45-60 minutes

science

Coke and Mentos Science Project

Turn the Coke and Mentos geyser into a science fair project with a hypothesis, variables, data table, and safe comparison tests.

Easy · 30 minutes

coding

First Python Quiz Game for Kids

Copy, paste, and customize a beginner Python quiz game for kids while learning print(), input(), variables, and if statements.

Easy · 1 hour

science

Baking Soda Volcano

Build a mini volcano and trigger a bubbly eruption with a classic acid-and-base reaction.

Easy · 1 hour

science

Elephant Toothpaste Experiment

Watch a giant foam tower erupt from a single bottle as hydrogen peroxide breaks apart and releases oxygen in a spectacular exothermic reaction.

Medium · 30 minutes

science

Making Oobleck

Mix just two ingredients to make a mysterious goop that flows like a liquid but turns solid when you squeeze it, and discover the science of non-Newtonian fluids.

Easy · 20 minutes

engineering

Rubber Band-Powered Car

A simple DIY car that moves without electricity or batteries, just the stored energy of a twisted rubber band powering the wheels and axle forward.

Easy · 1-2 hours

science

Lemon-Powered Batteries

Turn lemons into a real battery and light up an LED by discovering how chemical energy becomes electrical energy.

Easy · 30-45 minutes

engineering

Balloon-Powered Car

Build a car that runs on air and discover how Newton's Third Law of Motion turns a simple balloon into a powerful engine.

Easy · 1-2 hours

Safety First!

Always have an adult present when doing experiments and projects. Wear safety goggles when needed, and work in a well-ventilated area. Safety is the most important part of any STEM project!

Have a Project Idea?

We'd love to hear your ideas! Share your STEM project suggestions with us.

Share Your Idea