Hatch a praying mantis egg case in a homemade habitat with your child's help! This is an amazing experiment in science and nature for kids of any age.

Help your second grader observe the phases of the moon, and then let the fun loose: he'll get to chart his observations with marshmallows!

This science fair project idea experiments with spinning color wheels and optical illusions.

What's the relationship between temperature, air humidity and static electricity? Kids will find out with this free static electricity science fair project.

How to test for acids and bases? In this activity you and your child can make your own indicator from red cabbage!

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

Students will investigate the thermal conductivity of metals by learning how to measure thermal conductivity with this fun and easy science fair project idea.

Find out which type of sponge holds the most water.

Create a mini plant habitat with your kid to help teach him what it takes to make an ecosystem work.

Teach your child some scientific basics as you explore the densities of various liquids in this fun experiment.

This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.

Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

Help your child experiment with the combination of acid and baking soda by making these homemade bath bombs!

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

This science fair project focuses on the use of a conductivity device that will determine if a substance dissolved in water can or cannot conduct electricity.

In this science fair project, students use the streak test to tell minerals apart from each other.

Making your own glass cleaner is easy, effective and inexpensive!

Inspire your child to put on her engineer hat for the day, as she builds her very own, double-decker bridge.

Check out this mind-blowing experiment in which a hard-boiled egg will fit through an impossibly small opening with the help of only a few matches!

What causes sound? Here's a simple science experiment that adds a visual element to the science of sound to help kids better understand this tricky concept.

In this fun science fair project idea learn about universal solvents and solutes and find out the solubility of several common liquid substances.

Science fair project in which you will attempt to throw a ball the greatest horizontal distance possible by using different angles.

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.

In this microwave plant experiment, find out whether microwave radiation will affect radish seed germination. Will it help or hinder the plants' growth?

There are many benefits to bugs and insects. This science project shows how cockroaches, termites, and other critters benefit our planet.