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

When you see those sunscreen "protection levels," what does that really mean? Try this experiment to find out.

Here's an interesting activity that will enable your child to make his own magnifier out of a drop of water

Your child might have noticed how bubbles quickly lose their colors and pop. Check out this creative way to make those bubbles last longer.

What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.

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.

Most people assume that cold water freezes more quickly, but could that be false? Does hot water freeze faster than cold water? Let's find out!

Has your kid noticed how much bigger the moon looks when it's low in the sky? Here's an activity you can do to show them that it's just an optical illusion.

Help your curious third grader construct a dazzling spinning wheel that will teach him about the science behind colors while providing some silly entertainment!

This surprisingly good glue recipe comes from common kitchen items.

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!

Make your own helicopter using a paper clip and a sheet of paper. Hold the spinner up in the air, let it go, and watch it spin gracefully to the ground.

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

In this fun activity, your child will create their very own solar oven to bake s'mores!

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

If your science savy third grader is up for a challenge, let her bend light with a casserole dish!

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

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

Introduce your child to the world of motion and physics with a bit of marble play inspired by Sir Isaac Newton!

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?

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

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

Your kid can learn about the process of making frozen yogurt and enjoy a homemade, flavorful dessert. Experiment with this fun, chilly food!

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

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

Celebrate April Fools' Day with a science prank that is sure to amuse...and educate too!

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

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.

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