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

This is a quick, easy science fair project that conveys the idea of density to upper elementary students.

This science fair project idea explores the relationship between oil and water in terms of density as well as hydrophilic/hydrophobic compounds.

This science fair project idea investigates which objects float and sink in honey, water, and oil.

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.

How powerful is the reaction between baking soda and vinegar? Find out here!

First grade science often covers solids, liquids, and gases. This silly science explores serious facts about the difference between all three.

This science exploration lets your first grader see how eggs can provide a perfect environment for a living, growing creature.

Get your hands on a concoction that breaks the rules about what's a solid and what's a liquid.

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

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

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.

It's food. It's Thanksgiving tradition. And guess what: Cranberry Sauce is also science! Try our simple recipe/experiment.

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!

Chemistry is a blast with this backyard bomb made from a sandwich bag. All you need are ingredients from the pantry to create a satisfying, and safe, explosion.

It's easier than you think to make homemade play dough -- just a few pantry staples makes a natural version of the toy that kids have loved for generations.

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.

Here's a science experiment that gives your kids a chance to see how fire needs oxygen to burn, with a little math and writing practice thrown in.

In this Halloween-themed activity, young learners will find out what happens when they mix two household items together to create a surprising chemical reaction.

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.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

Teach your first grade scientist the difference between liquids and solids using maple syrup.

This science activity will help your student explore the changes that occur to transform an egg from raw to soft to hard-boiled.