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

What's the science behind those out-of-sight roots? Find out if you can trick roots into growing in different directions.

Discover whether different amounts of water added into a wine glass will produce a different pitch when their fingers are rubbed along the rim.

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

This science fair project idea explores whether white light can be separated into different colors.

Take a dive into the candy jar with this yummy science experiment.

Science fair project that compares the ecology of different soil samples by identifying which sample has the most invertebrates living in it.

Learn how to make a food pyramid with animals in a a coniferous forest ecosystem around your home.

Check out this cool science fair project on identifying rocks and minerals for kids.

Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

In this science fair project, kids start a chemical reaction that will make a balloon inflate itself!

This science project allows students to study the psychology of happiness.

This science fair project idea investigates if webbed feet help a duck (and others) swim.

This science fair project idea researches the different layers of the atmosphere and creates a visual representation of the atmospheric layers.

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

In this fun science project, learn about what happens to cut fruit and experiment with how to stop apples from turning brown.

This science fair project idea recreates the movement of planetary bodies in order to learn why they sometimes appear to move backwards.

Science fair project determines relationship between number and variety of insects and spiders by collecting and counting invertebrates in a ecosystem.

The purpose of this study is to determine if people can tell the difference between organic and conventional food from looking at, smelling and tasting it.

In this CD hovercraft science project, students will construct their own DIY hovercraft.

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

This project examines what types of objects burn and which burn faster and cleaner.

This science fair project idea explores whether a sundial is as accurate as an atomic clock when telling time.

Examine the effect of pressure on carbonation in soda.

In this Bernoulli's Principle experiment, you'll learn how an increase in the speed of a fluid, like air, decreases pressure.

Learn about sound physics and do a survey experiment to explore the difference between sound and noise in this science project.

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

Do lefties just write different or are their brains different? This science project has students explore what it means to be left handed.

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