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This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

This science project has students study a group of volunteer liars actively lying to study the behavior of a lie. Students see if they can figure out the truth.

In this science fair project, apply the principles of leverage and force by building six simple machines designed to set weights in motion.

This activity turns your kid into the family weatherman. Plus, it teaches him to collect data and begin to understand graphing.

You've heard the expression "burn rubber" but do you know how heat affects rubber? Examine the impact of temperature on rubber in this fun science experiment.

Your kid will delight in creating an extraterrestrial vehicle from goods found around the house. There's no telling where her imagination will go!

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

Observe with your third grader what happens when food starts to decompose, and boost science skills simultaneously with this experiment!

Reuse and recycle cardboard tubes to make spooky spiders, kooky caterpillars, wacky worms, and more.

Kids will learn about the interaction of lactose and lactase in milk and discover why we describe enzymes as catalysts in this fun science fair project.

How do we know that air exists when we can't see it, taste it, or touch it? Here's a classic experiment that will teach your kid some basics of aerodynamics!

Help your child create a garden journal sketchbook as she observes and records the natural world through the changing seasons.

The purpose of this science fair project is to study the properties of sugar and examine individual preferences for sugar and other sweeteners.

Grow a garden with an environmentally-friendly twist by using plant scraps that usually get thrown away.

Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.

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

This simple experiment serves as an introduction to the greenhouse effect.

This science fair project idea explores how the shape of a boat affects its density and how much weight it can float.

Try this fun and simple activity to help nurture your child's observation skills and nourish a growing love of science!

What better way to nurture your child's imagination than by making a fairy house out of materials found in nature!

Have your child make a special mobile inspired by the weather outside. Learn about seasons, the environment, and art in 3D.

Construct and experiment with a periscope using reflected light rays to gather an image.

What's the chemistry behind dyeing Easter eggs? Will adding vinegar to dye help the eggshell absorb the color? This colorful science project has the answers!

This light bulb science project includes step-by-step instructions for testing the heat from different light bulbs.

Create homemade seed packets with your kids. This activity combines your kids' love of science and the outdoors with a little writing and drawing fun.

Help your kindergarten scientist understand the concept of surface tension with this simple science experiment.

Try this chemistry experiment with your curious kid and get some "shocking" results!

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

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

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