Help your second grade scientist explore the timely topic of wind speed using a version of the classic Beaufort Scale.

Water can go from solid to liquid to gas...but how does popcorn go from kernel to snack? Invite your first grade scientist to find out.

This easy Halloween-themed science experiment for first-graders is perfect for chilly October afternoons or great as a Halloween party activity.

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

In this science experiment, your child will test the strength of hollow structures in order to understand how strong bird bones really are.

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.

Put your second grade scientist to work this Fourth of July with our colorful "liquid fireworks" project!

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

Experiment with buoyancy to learn how a submarine rises and sinks in this classic science experiment.

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

Students pit the heat capacity of water against the heat capacity of oil while looking at the effects of dipole rotation in this cool science fair project idea.

Here's a fun science experiment that's refreshingly tasty too! Turn regular water into a tasty treat perfect for consuming on a hot day.

Air invisible; it doesn't make sounds; you can't pick it up and throw it. So how do we know it exists? Help your second grade scientist figure it out.

How does the size of a vibrating surface affect the pitch of a drum? Learn about drum size and pitch with this easy science fair project idea.

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

Stir up some enthusiasm for experimentation with this candy-cracking science experiment!

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