This science fair experiment idea's objective is to understand the general concept of an acid and a base.

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

Do you think you can blow down a sand castle with a mighty wind? Find out which material stands up best to erosion in this erosion experiment.

Are your taste buds up for the challenge? Put tongues to the test with this science fair project that examines who enjoys sour flavors more, adults or kids?

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

This science fair project examines how tsunamis travel by simulating a tsunami moving around an island. You will generate a pretend tsunami in a swimming pool.

People have favorite flavors, but what about ants? Which ant food is the most popular?

Science fair project which determines whether people are more likely to follow rules if they are easy to understand.

This science fair project idea investigates how magnetism can defy the force of gravity.

Can you dig it? This science experiment isn't for kids who like to keep their hands clean.

This science fair project idea studies which brand of wintergreen candy produces the most sparks in the dark.

This science fair project idea explores how far the âdanger zoneâ is from different types of caution signs.

Kids often ask, "how tall am I?" This science fair project seeks to determine how well kids can guess their own heights.

Explore how sound waves are reflected and absorbed by producing echoes. Analyze which locations produce echoes.

This science fair project idea explores whether a plastic slinky works as well as a metal slinky when walking it down the stairs.

In this science fair project, we learn how air molecules move as a result of density, convection, and air currents.

Science fair project examining barometric pressure, and how it can be used to predict the weather. How does atmospheric pressures relate to weather conditions?

Is cleaning with lemon effective? Get ready to give this science project some elbow grease and find out if acidic lemons can be used as a cleaning agent.

This science fair project will help students learn about non-vascular plants, such as mosses.

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

What are buttress roots? In this fun science project, make a model of a rainforest tree and learn how they help trees survive in the tropical rainforest!

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

This basketball project explores the best way to make the perfect shot every time.

Learn how to make a hygrometer to measure relative humidity in this project. Make a sling psychrometer hygrometer with gauze, thermometers, and a bottle.

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

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

This experiment tests which gender is better at catching how a magician performs his tricks.

How good are humans at sound localization? Kids can try this cool science fair project idea to see how good their friends are at judging sound direction.

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

What is a compound microscope? Kids find out by making one of their own in this cool science fair project.