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This science project explores the concept of being opaque or clear. Can you make something clear opaque? Or something opaque clear?

Find out whether packaged seeds actually do expire in this new science fair project idea.

Kids grow sunflower greens from seeds for a hands-on gardening experience in this kindergarten life science activity.

Teach your child how to make an all-natural, yellow-brown dye, using just walnut shells and water. This deep dye can be used on textiles, art, and wood.

A simple science experiment exploring the physics of water pressure that's been amazing people since Medieval times.

This science fair project idea investigates if webbed feet help a duck (and others) swim.

This science fair project idea investigates how the shape of an object affects drag.

You and your child can create this beautiful butterfly mobile for hanging anywhere in the home (and learn about this magical creature while you're at it).

The objective of this science fair project is to examine the basic principles of air pressure using simple materials like a balloon, straw and string.

Kids will make predictions about cricket behavior by conducting this fun and easy experiment which simulates different environments for crickets.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

The moon doesn't produce its own light, so why can we see it shining in the sky? Learn about reflection and planetshine in this fun and easy science project!

An home science experiment for older students that teaches about the science behind heat.

This science fair project idea determines the most effective method of preserving food.

Children use their design thinking skills and powers of observation to create and construct a bird nest.

Word color association is just a fancy way to talk about the way we connect colors with words.

Make sourdough bread...and learn some colonial history and modern science in the process!

In this windmill model science project, you will build a windmill to learn about wheel-and-axle machines and how these simple machines are used to do work.

Soil and energy don't go together, right? That would be as bizarre as a pairing of peanut butter and marshmallows! Well, actually...

Nature is the greatest teacher, and you can help facilitate the lesson! Here's how to create a supply backpack to get your kid ready for science action!

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

Here's a science activity to help your child investigate how seeds are designed to travel.

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

Chemistry is a blast with this backyard bomb made from a sandwich bag. All you need are ingredients from the pantry to create a satisfying, and safe, explosion.

Check out this fun science fair project to make a vinegar and baking soda balloon and demonstrate how gas is created as a result of the chemical reaction.

Are you looking for an out-of-this world activity that's both fun and educational? This solar system garland is a great way to introduce your child to astronomy.

Got a birdwatcher on your hands? Bring the birds to your backyard by making a zany bird feeder using an orange and some string.

Examine the effect of pressure on carbonation in soda.

Does dough rise faster with unbleached or bleached flour? Investigate in this science fair project idea.

Here's a fun activity that will introduce your fourth grader to the concept of frictionless motion by constructing a hovercraft.