In this 3rd grade science activity, you'll experiment with the little-known fourth state of matter: polymers! Mix borax with white glue and watch what happens.

This easy Halloween-themed science experiment for first-graders is perfect for chilly October afternoons or great as a Halloween party activity.

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.

Make a DIY golf putter and design your own golf putting course in this 2nd-3rd grade arts and crafts/game activity.

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

How does water pressure change with depth? Kids learn how pressure works underwater with this cool and easy demo.

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.

In this project, build an insect model that shows how the head, thorax, and abdomen fit together! Learn insect anatomy by constructing a paper mache critter.

This science fair project explores how osmotic pressure forces water through the root up into the plant.

This science fair project idea determines if the size of the parachute will change the rate at which an object falls.

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

How does dishwashing liquid work? Kids discover the chemical mechanism behind cleansing power in this easy science fair project idea.

This easy aerodynamics activity is a simple way to introduce kids to the scientific method.

Teach your creative second grader about proportions, animals, and proper cutting methods with cucumber carving.

How do mirrors work? What is light, and how does it travel? Explore light and reflection with your preschooler with these simple hands-on experiments.

Here's a first grade ladybug game that explores how air can move solid objects, and adds some measurement practice, too. Play, learn, and enjoy!

Take a nature walk in your backyard or local park to find one object for every letter of the alphabet. Then put them together in this handy nature book.

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.

Water can go from solid to liquid to gas...but how does popcorn go from kernel to snack? Invite your first grade scientist to find out.

Slip some science into storm watching with a homemade rain gauge!

Crayons aren't just good for creating colorful masterpieces -- they're also great for science!

In this activity, students will be challenged to describe and count the ways a toy moves from one position on a grid to another.

Make your own marshmallows and mix up some very interesting third grade chemistry lessons while you're at it!

Has your child ever asked you how a submarine works? Here's a simple bathtub project that will make for a hands-on answer.

Help your child create a tasty treat that will demonstrate exactly how frogs survive a freezing season.

This science experiment tests whether warm or cold water works best in making cut flowers last longer.

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.

In this exciting design challenge, your child will use design thinking skills to create a mixture that can inflate a balloon.

How does the size of a vibrating surface affect the pitch of a drum? Learn about drum size and pitch with this easy science fair project idea.