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.

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

This science fair project idea identifies trees using a dichotomous key.

Can you increase the light and plant growth in your garden using mirrors? In this experiment, measure light reflection and find out!

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

Check out this fun science fair project to make a vinegar and baking soda balloon and demonstrate how gas is created as a result of the chemical reaction.

Construct and experiment with a periscope using reflected light rays to gather an image.

This science fair project idea produces sounds by creating vibrations using different objects.

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

Science fair project that examines how to grow bacteria in a controlled setting, using simple materials from around the home.

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

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

In this design challenge, your child will create a parachute for a small toy using typical household items.

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

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

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

Create a DIY Electromagnet! Using a 9v battery to create an electrical field around a nail, students explore electromagnetism in this cool science project idea.

Experiment about connection of senses of taste and smell. Using blindfold and noseplugs, administer blind taste test. Analyze results and organize data.

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

The objective of this science fair project is to examine the basic principles of air pressure using simple materials like a balloon, straw and string.

This cool and easy elementary school science fair project idea provides the basic information on the use of our senses to experience the world about us.

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

Find out which kind of bubble wrap fares best when put in impact.

What combination of cloth and stain will be the easiest for removing stains? Test and experiment!

In this fun activity, your child will create their very own solar oven to bake s'mores!

This science fair project demonstrates the magic of arches by challenging students to stack telephone books on top of eggs without breaking them.

Science fair project about work and energy which uses a simple mathematical formula to predict how far a jar will roll down an incline.

In this project, the fingerprints of family members are compared to determine if people from the same family have similar fingerprints.