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

This project determines whether Styrofoam, paper, or plastic cups are best for preventing ice from melting.

This classic children's game demonstrates how sound travels through air vs. through a solid.

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

Can you imagine a sky filled with bright, colorful bubbles? Make this whimsical scene come alive with bubble science!

Plants and light seem to be good buddies, but how far does the friendship really go?

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.

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.

When you rub a balloon on your head, your hair stands up; but is that true for everyone? Does hair color affect static electricity?

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.

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

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.

Here's a fun science experiment that's refreshingly tasty too! Turn regular water into a tasty treat perfect for consuming on a hot day.

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

Science fair project that determines whether lettuce that is harvested gradually yields more produce than lettuce that is harvested all at once.

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

Satisfy your sweet tooth with this easy summer activity! Make homemade ice cream and let your child practice his science skills.

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

Make some easy homemade yogurt with your young scientist, and see what a few 'live' bacteria can do in the right conditions!

Milk is made of water and fat; but how can you separate the two? Find out in this color changing milk experiment.

This project examines whether people's taste perception is influenced by what they see.

This science fair project teaches students about wilting and browning of salad greens.

Help your second grade scientist explore the timely topic of wind speed using a version of the classic Beaufort Scale.

Kids will build a turtle habitat in order to observe the climate preferences of this cold-blooded reptile.

Perk up your front porch with this hanging vase craft, perfect for spring and for getting kids outdoors!

Air invisible; it doesn't make sounds; you can't pick it up and throw it. So how do we know it exists? Help your second grade scientist figure it out.

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

Get down to the rubber with this science project that tests the effectiveness of different types of erasers.

Learn about the layers of the Earth and make a model! Create a earth layer book, cake, or clay diagram.

The next time you've got a restless second grade earth scientist on your hands, use this experiment to demonstrate crystals and make a tasty treat, too!