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

Use simple items to create a kindergarten "grow box" that lets a kid see just how salad plants send down their roots and grow underground.

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

Determine if gender affects the ability to identify different smells.

The project determines the forces that cause paper airplanes to fly and determine which type of paper airplane flies the farthest.

Gather some friends for a bubbly soda taste test do determine calories' role in your favorite drinks.

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

The goal of this golf science fair science fair project is to determine whether the temperature of a golf ball affects its elasticity and its rebound.

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 experiment, your child will create two compost bins and see if he can determine what attracts fruit flies.

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

Here is a hands-on activity to help third graders understand the four points of a compass...and how we use them to get around.

In this science fair project, kids observe the expansion of liquids when frozen and determine if some liquids expand more than others in the freezing process.

Can a toy car determine the strength of a magnet? In this cool magnet science fair project, young scientists will learn how to measure the strength of a magnet.

Grow a garden with an environmentally-friendly twist by using plant scraps that usually get thrown away.

Using scherenschnitte, your science-savvy second grader will be able to create and display each part of a vegetable!

In this activity, young learners will make a balance using a plastic hanger and weigh a variety of small objects using candy corn.

Science fair project which determines if plants really do need water to grow, or whether they just need to be kept wet.

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

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

This project determines what category of person is most likely to be ticklish.

In this project, waves of vibrations are experimented with using water in glasses.

The project investigates how friction affects motion by using different surface textures.

Learn to solve a crime scene investigation using an important forensics tool: oblique lighting.

In this science fair project you will make a model of a cell membrane using very simple material.

In this activity, your child will be challenged to make a tower using paper cups.

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

Recreate the fantastic phenomena of solar eclipses with your child using just a flashlight, a quarter, and her very own face!

In this exciting and empowering challenge, your child will construct a bridge using marshmallows and toothpicks!

This science fair project idea determines which method of hand cleansing is the most effective.