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

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!

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

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

What causes sound? Here's a simple science experiment that adds a visual element to the science of sound to help kids better understand this tricky concept.

Want to make Halloween truly eerie? Science to the rescue! These ghouly hands come alive with a little help from simple chemistry.

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

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

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

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!

How do mirrors work? What is light, and how does it travel? Explore light and reflection with your preschooler with these simple hands-on experiments.

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

In this fun science fair project idea learn about universal solvents and solutes and find out the solubility of several common liquid substances.

Your kid will be captivated as she watches liquids change color before her very eyes during this fun science project that introduces some chemistry basics.

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

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!

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

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

Let your young scientist explore a brave new world of sound with an experiment that just requires a handful of common household items.

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

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.

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

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!

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

Discover whether different amounts of water added into a wine glass will produce a different pitch when their fingers are rubbed along the rim.

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

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

This classic children's game demonstrates how sound travels through air vs. through a solid.

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.

Try the classic balloon-on-the-wall trick with your kid and watch static electricity in action.