How does rust form? Kids will learn about the roles oxygen, water, and electrons play in rust chemistry in this cool science fair project idea.

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

Teach your child how butter is created by shaking up cream the old-fashioned way.

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 we know that air exists when we can't see it, taste it, or touch it? Here's a classic experiment that will teach your kid some basics of aerodynamics!

This balloon-powered car project is a great way for your kid to learn about energy and how it can be used efficiently.

Let your young scientist explore a brave new world of sound with an experiment that just requires a handful of common household items.

Do this experiment to help your first grader understand how salt can be removed from salt water. All it takes are a few household materials.

Teach your kids about entropy with this fun, easy exercise, and teach your money to dance while you're at it!

Here's a great activity that uses corks and toothpicks to create a fleet of floating boats. Which design makes for the most seaworthy vessel?

Looking for an enjoyable evening activity you can do with your kids? Study the stars: help them learn about constellations by making one of their own.

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.

What's cooler than an explosion? Not much! This simple science experiment lets kids build their own pop rocket. So put on your safety goggles and let her rip.

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

Make your own marshmallows and mix up some very interesting third grade chemistry lessons while you're at it!

Try this experiment to give your curious kid a more "solid" understanding of how temperature affects the states of matter.

Explore solids and liquids with your young scientist by making gluep, a goopy substance that can behave like both a solid and a liquid!

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

Put a twist on traditional oil painting with this fun science activity that you and your first grader can do together.