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How does a compass work? What's a magnetic field? Kids will build their own compass at home to find the answers in this great science fair project idea.

Children will learn all about cause and effect as they experiment with potion-making in this Halloween themed activity.

Tired of gum with flavor that lasts for just a couple of minute? Put gum to the test with this chewy science experiment!

Saturn is the ringed planet in our solar system, a gas giant with rings made of ice and dust. Let's make a cool scale model with an old CD and some glitter!

This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.

This science fair project teaches students the differences between fruits and vegetables.

Test your friends to find out if you can replicate the placebo effect's incredible results.

This science fair project idea investigates how optical distances change the apparent size of an object as seen through a magnifying lens.

In this activity your child will create their very own marble maze!

Explore if planting seeds in a certain direction will affect how fast it germinates.

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

This science fair project idea explores how length affects the weight a bridge can hold.

Enter the buzz worthy world of bee watching and find out what time bees like to wake up!

Did you know a mouse eats almost fifty times as much as a cow? Find out how and test out the strange science with your friends!

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?

Find out whether a longer airplane will fly farther or a wider paper airplane.

This science fair project idea investigates how the height at which a pendulum is released affects the length of time it continues.

Do you think heat can affect a plant's growth rate?

In this fun science experiment, kids will determine the best method for ripening avocados and discover the cool chemical reaction that makes this possible.

What keeps a an item cooler, polymer crystals or ice? Find out in this cool science experiment!

This science fair project idea investigates the hardness property of minerals.

In this design challenge, your child will make a bottle rocket using typical household items.

What is persistence of vision? With this hands-on science fair project idea, students will demonstrate this cool and dramatic phenomenon in their own classroom.

In this project students experiment with making music using only glasses of water.

It's rhyme time! With this science fair project idea, your child will find out which words can be considered easy rhyming words, and why.

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

Learn about savanna flora and fauna in this science project! Take a look at characteristics of tropical grassland plants and animals that help them survive.

Use pepper and soap to discover some fun facts about the properties of water.

Young scientists will investigate people's preferences for saltiness, and make some inferences about genetics and diet.