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

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

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

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

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.

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

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

Amaze your kids by separating a salt and pepper mixture using an "electric spoon" charged with wool.

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

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

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

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

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.

This 4th of July, explore fourth grade science and make some safe fireworks in your own backyard using soda pop!

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

Teach your child how to make an all-natural, yellow-brown dye, using just walnut shells and water. This deep dye can be used on textiles, art, and wood.

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.

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.