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

This simple "how to make a water wheel" activity makes physics come alive for your child by demonstrating how different kinds of energy work.

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

Magic, science, or household cleanser? Let your second grader decide with this practical, nontoxic chemistry experiment with acids and bases.

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.

Has your child ever asked you how a submarine works? Here's a simple bathtub project that will make for a hands-on answer.

What's a liquid? What's a solid? What better way to experiment than by turning a childhood favorite, ice cream, into a homemade science lesson!

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

Your second grader will love this simple soda bottle race car activity. Make a ramp and customize your car for an entertaining way to learn scientific concepts.

Here's a fun math and science activity: help your child explore four different kinds of measurement, using their hand and a few simple household tools.

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

Sink or swim? Calculate the density of various fruits and vegetables using water and a kitchen scale.

Let your fourth grade chef mix up butter and sugar with scientific principles about different states of matter, and get delicious toffee, too.

Learn with makes water molecules work with this fun and easy science activity!

This science fair project idea explores whether talking to a plant will help it grow.

Help your kid feel like a superhero with this safe and fun science experiment that creates an electrical charge that's like a mini lightning bolt!

Here's a classic celery science experiment that uses celery and food coloring to demonstrate how plants absorb water.

Learn how to make marbleized paper with simple everyday ingredients in this fun activity! Your child will learn about oil and water while doing this project.

Children combine an acid and an alkaline substance to simulate a volcano eruption in this fun experiment.

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

Give your child an introduction to food preservation by making and canning your own yummy, homemade pasta sauce!

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

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.

Based on the concept of water's "freezing point," this activity entails the lowering of water's freezing point to chill ice cream!