This science fair project idea measures out the sugar of various foods and find out whether people can correctly determine how much sugar is in common foods.

This simple "how to make a water wheel" activity makes physics come alive for your child by demonstrating how different kinds of energy work.

What can you do with hair after its cut? This science project teaches you practical uses for human hair.

Science fair project which examines the relationship between frequency of spider web vibration and spider's response time.

Learn how to make a weathervane with this fun and simple meteorology project for fourth graders.

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.

This science fair project explores how osmotic pressure forces water through the root up into the plant.

Kids will learn how to measure the viscosity of liquids by making their own homemade viscometer in this great science fair project idea.

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

Create safe lightning for kids! They'll learn how to make lightning at home with this fun science fair project idea illustrating static charges and grounding.

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

Demonstrate how you can make your own compass using a magnetized needle. It also allows you to compare magnetic north and geographic north.

Experiment with buoyancy to learn how a submarine rises and sinks in this classic science experiment.

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

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

In this science experiment, your child will test the strength of hollow structures in order to understand how strong bird bones really are.

This science fair project explains the process of how the lungs expand and contract with the help of the diaphragm.

In this activity, you'll not only make your own bouncy balls at home, but your child will also learn how polymers are made.

How do mirrors work? What is light, and how does it travel? Explore light and reflection with your preschooler with these simple hands-on experiments.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

How do organic materials become soil? This science experiment measures what materials biodegrade.

Learn the basic structure of a DNA strand, which is the double helix, how genes form together, and the resemblance DNA has to a twisted ladder. Create a model.

How do you tell time without a watch? Use the sun! This simple activity will show your child how to build his own sundial.

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

In this cool experiment, learn how to find specific gravity of minerals using liquids of different densities to see which substances and items sink and float.

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