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Here's a math, science, and social studies activity: help your kindergartener become a "coin archaeologist" by examining how different coins look and feel.

This project investigates the affect of storage temperature on microwave popcorn.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

In this activity, your child will be challenged to build a tall tower out of building bricks! The instructions include questions prompts to guide students through the design challenge.

What causes dilated pupils? Young scientists will find out by applying what they already know about changes in pupil size and making models of the pupil.

This science fair project idea explores whether there is a connection to the color a person wears and the way their emotional state is perceived by others.

Learn how to be a bird scientist in this simple project of watching feathered friends in their habitat.

This science fair project focuses on the use of a conductivity device that will determine if a substance dissolved in water can or cannot conduct electricity.

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

This science fair project examines how seeds hitchhike on animals and clothing.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

In this science experiment, your child will test the strength of hollow structures in order to understand how strong bird bones really are.

What's the science behind those out-of-sight roots? Find out if you can trick roots into growing in different directions.

This science fair project investigates why the number of visible stars changes from place to place.

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.

Explore the scientific concept of capacity by seeing how many pennies you boat can hold before it sinks!

It's not actually that hard to get energy from garbage! Kids learn how to make biogas in the form of methane with this cool and easy science fair project idea.

You've heard all about oil spills, but can they really be that bad? After all, vegetable oil is in almost every yummy baking good from cookies to brownies.

This science fair project idea investigates how a bottom keel helps keep a boat from rocking back and forth.

This science fair project idea examines whether boys and girls differ in reflexes.

Be a chemist for a day and study the simple reaction between sugar and heat. Try heating sugar and see what happens!

Test out the pH levels of soil in your backyard versus soil in more wild environments to solve this science case.

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.

Is it magic? No...it's the amazing, gravity-defying capillary action experiment! Kids will love this dramatic and enlightening science fair project.

Can you plant the insect-attracting borage plant to increase the amount of beneficial insects in your garden? Find out in this experiment!

Here's an easy experiment that lets your first grader practice the scientific method, while watching a caterpillar eat.

What does a raindrop look like when it splashes on the ground? Is each raindrop unique like snowflakes? Find out how raindrop size varies in this experiment.

In this cool science experiment, learn about magnetism and poles, and test magnet strength to find out if two magnets are twice as strong as one.

Science fair project that compares the ecology of different soil samples by identifying which sample has the most invertebrates living in it.

What's the best way to make DIY compost? Kids will learn about aerobic and anaerobic decomposition while learning to appreciate the value of composting.