Encourage a group of third graders to play this fun game of Whistle Hide-and-Seek as a warm-up to get them prepared for finding a "lost" camper.

Is it amplitude? Weight? Length of string? Kids will discover what factors changing the period of a pendulum depends on in this fun and easy physics experiment.

Which music genres have the fastest tempos? The slowest? This experiment determines if there's a relationship between beats per minute in a song and its genre.

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

In this plant habitats activity, children play the role of an ecologist and take surveys of different areas to discover the best habitat for dandelions.

What do worms eat? Kids find out what kinds of rotting leaves and vegetables worms prefer in this cool compost science fair project.

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.

The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.

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

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

This interdisciplinary card game will have your third grader working on math facts as he travels through the solar system!

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

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

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

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.

Celebrate April Fools' Day with a science prank that is sure to amuse...and educate too!

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

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

Your child might have noticed how bubbles quickly lose their colors and pop. Check out this creative way to make those bubbles last longer.

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

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

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

Start your toy engines -- this is going to be a fast and friction-filled race!

Show your fourth grader how to see her heart in action. Make a simple device out of a drinking straw and clay to help her spot the movement of her pulse!

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

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

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.

In this experiment, kids will see if pruning tomato plants makes them more fruitful and learn about the factors that contribute to a plant's fruit production.