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

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

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

The objective of this science fair project is to examine the effects of temperature on salt and water solutions, as they form crystals over time.

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.

Determine whether butterflies like to drink sugar water, salt water, or plain water.

Take to the air with science by experimenting with helicopter seeds right in your own backyard!

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

Create a homemade pair of sunglasses with colored lenses to see just how light and color affect our sight! Use this fun project to practice science!

Examine which metal conducts more heat by boiling water in 3 pans made of aluminum, copper, and stainless steel.

With this science fair idea, little scientists will gain valuable insights into the physics behind throwing a baseball.

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.

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

The goal of this golf science fair science fair project is to determine whether the temperature of a golf ball affects its elasticity and its rebound.

This science fair project idea determines what household items are good conductors of electricity.

Science fair project idea that examines different physical characteristics of a chosen animal. Make educated guesses about evolution based on animal's form.

This science fair project idea determines what household items are good conductors of electricity.

What causes dilated pupils? Young scientists will find out by applying what they already know about changes in pupil size and making models of the pupil.

Cleaning can be a chore, but not with this sudsy experiment!

This educated-guessing game is great for preschoolers. This activity helps your child work on her reasoning skills.

Celebrate autumn with a seasonal bash. Welcome the fall with a festive party for your little one and her friends, full of crafts, snacks and fun games.

This science fair project idea experiments with spinning color wheels and optical illusions.

Learners hypothesize about and experiment with soil erosion in this hands-on activity.