Is it a square or a circle? See if you can trick your friends with this zany science project!

In this air pressure science experiment with a balloon and a jar, children will use heat to create a partial vacuum and suck a balloon into a jar.

In this project combining nature, art, math, and science, children make rubbings of leaves then observe shapes and structures and sort the leaf images.

Wool can absorb 1/3 of its weight in water, while still keeping the body warm. She can test this theory by performing a scientific sock comparison!

Creating a home for a toad is an easy and fun project for kids. Here's how to make your very own toad abode.

Science fair project that demonstrates the effect of detergent pollution on fresh water birds' ability to stay afloat.

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

Create a self-portrait from natural materials in this collage craft activity!

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

This fun marbled paper craft uses things you're likely to have around your house, and it teaches kids some simple chemistry too!

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 classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

This activity works well with a group or just with a parent and child, and it can make a great party game since it's both fun and inexpensive.

Delight your budding scientist with this cool physics magic trick and teach her some basic physics concepts while you're at it!

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

In this Halloween-themed activity, young learners will find out what happens when they mix two household items together to create a surprising chemical reaction.

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

Bring the fun of gardening indoors! By stuffing a simple pair of pantyhose with a few grass seeds on top, your child can grow her very own plant pet.

Create a mini plant habitat with your kid to help teach him what it takes to make an ecosystem work.

Before you get ready for a delicious scramble or omelet, add a bit of science to your morning routine!

This weather spinner will improve observation skills by encouraging children to examine and track weather details and patterns.

Teach your child to dye eggs with natural ingredients from the grocery store. From pink to gold, these eggs are perfect for hiding, hunting or simply munching.

Using a toy race car kids create a visual model of the Doppler Effect.

Science fair project which determines whether the size or the thickness of a piece of paper has an effect on how many times it can be folded in half.

Here's a classic celery science experiment that uses celery and food coloring to demonstrate how plants absorb water.

Try this simple 2nd grade science experiment to teach your child about the principles of luminosity and light reflection.

Find the North Star, and measure your latitude! The purpose of this science fair project is to find latitude and learn about geographic locations.

Learn about this simple machine and make a pulley of your own to use for fun science trials.

In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.