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

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

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.

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

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!

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

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

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

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

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

How do series and parallel circuits work, and which produces the brightest light in a light bulb? Construct both in this project and find out!

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

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

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

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.

This science fair project demonstrates the principles of reflection through simple experiments involving mirrors and light.

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

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

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.

Teach your child some scientific basics as you explore the densities of various liquids in this fun experiment.

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.

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

Check out this mind-blowing experiment in which a hard-boiled egg will fit through an impossibly small opening with the help of only a few matches!

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!

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.

In this sound experiment children listen for differences as they tap on a bag of air, a bag of water, and a wooden block held up to their ears.

I scream, you scream, we all scream for homemade spearmint ice cream!

What is it about a Slinky that causes it to walk down the steps? This simple experiment is a perfect illustration of both gravity and momentum.

Introduce your second grader to the crazy world of static electricity with just a balloon and a sheet of paper.