In this science and engineering activity, children will explore types of tunnels and their purposes and then design and build a tunnel of their own.

Challenge your learner to design and build a city of their own in this creative engineering activity.

In this activity, children will work on their mathematics and engineering skills as they attempt to recreate the Eiffel Tower out of building blocks!

In this project, you'll build a model of the earth, complete with all seven continents and four major oceans.

The possibilities are endless with this fun Halloween-themed STEM activity! With simple supplies, your child will experiment, adapt, and use their creativity while they build structures using different specifications.

In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!

Kids build a desert food chain, desert food web, and desert food pyramid in this cool science fair project to learn about trophic levels and consumers.

In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

How does a compass work? What's a magnetic field? Kids will build their own compass at home to find the answers in this great science fair project idea.

Build a 3d animal cell model with this cool science fair project, which helps kids visualize and understand the function of a cell's parts and organelles.

Future engineers, unite! Discover how to keep a sandcastleâs bridge from falling into the moat.

This science fair project idea develops an understanding through experimentation of which shapes are the most structurally strong.

What is a compound microscope? Kids find out by making one of their own in this cool science fair project.

In this design challenge, your child will create a parachute for a small toy using typical household items.

Climates with more snowfall have more coniferous forests and fewer deciduous ? Learn about how pine trees in a coniferous forest adapted to withstand snow.

In this science fair project, apply the principles of leverage and force by building six simple machines designed to set weights in motion.

Spiders don't go to grocery stores or fast food chains to get their food -- they set up traps and wait for their food to come to them!

Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.

This science fair project idea experiments with spinning color wheels and optical illusions.

Have your child kick off their summer vacation by making a miniature water slide!

This science project has students collect wood samples and invent new uses for different types of wood based on its properties.

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

In this activity, your learner will be challenged to create their own tic-tac-toe grid out of building blocks.

This science fair project idea highlights decomposition rates by comparing how long it takes an item to decompose in a compost pile vs. a landfill.

This science fair project demonstrates the magic of arches by challenging students to stack telephone books on top of eggs without breaking them.

In this science project, the center of gravity is explored.