The next time you've got a restless second grade earth scientist on your hands, use this experiment to demonstrate crystals and make a tasty treat, too!

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.

Children use their design thinking skills and powers of observation to create and construct a bird nest.

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.

Use reusable, recyclable materials--along with a dose of imagination--to build a castle with first grade geometrical forms.

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.

This adventurous art project will send kids on a scavenger hunt for fall materials they can use in their artwork. This craft also teaches kids about seasons.

This activity is a fun way for your first grader to learn about how veggies help your body while being creative with art and drama. Here's how to get started.

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 kindergartener identify and sort eight different kinds of common seeds on this "seed wheel" plate you can use all growing season.

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.

Explore the scientific concept of capacity by seeing how many pennies you boat can hold before it sinks!

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!

This easy project for little hands uses mushroom spores to make an imprint of the mushroom, and the result is very beautiful.

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.