Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.

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.

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!

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

Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?

Children will learn all about cause and effect as they experiment with potion-making in this Halloween themed activity.

Start your toy engines -- this is going to be a fast and friction-filled race!

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

Make some easy homemade yogurt with your young scientist, and see what a few 'live' bacteria can do in the right conditions!

This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.

In this project, build an insect model that shows how the head, thorax, and abdomen fit together! Learn insect anatomy by constructing a paper mache critter.

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.

In this science fair project, students use the streak test to tell minerals apart from each other.

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

Make edible amber fossils with your second grader to explore the fascinating world of science!

When you rub a balloon on your head, your hair stands up; but is that true for everyone? Does hair color affect static electricity?

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

Help your child make a beautiful homemade sandcastle that will last!

This science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.

Is our water polluted? Help your young scientist understand the importance of taking care of the environment with this simple experiment.

This project determines whether Styrofoam, paper, or plastic cups are best for preventing ice from melting.

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

Here is a hands-on activity to help third graders understand the four points of a compass...and how we use them to get around.

This weather spinner will improve observation skills by encouraging children to examine and track weather details and patterns.

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

This second grade arts and crafts activity is all about caterpillars emerging from their cocoons as butterflies.

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!

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 science fair project teaches students the differences between fruits and vegetables.

This science fair project idea investigates how magnetism can defy the force of gravity.