Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

Science fair project that examines albedo, and how this information is applied in the design of cars, sportswear, and other items. Which colors reflect light?

In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

How can we describe the relationship of magnetic field strength vs. distance? Kids will find out with this free science fair project idea.

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!

Here is a fun middle school science project on factors affecting solubility. Learn how dissolved solids can "crash out" to form crystals when conditions change.

In this project, build an insect model that shows how the head, thorax, and abdomen fit together! Learn insect anatomy by constructing a paper mache critter.

This science fair project idea examines whether adding gelatin causes a solid to have a higher melting point and/or melt slower.

Science fair project which determines whether the size or the thickness of a piece of paper has an effect on how many times it can be folded in half.

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!

Discover whether a metal will expand under hot water.

This science fair project idea determines if the size of the parachute will change the rate at which an object falls.

Discover whether cold or hot water from the faucet will boil faster on the stove.

Will storing cucumbers and tomatoes in the fridge destroy their unique flavors? Find out in this science fair project idea!

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

Did you ever add salt to pasta? Did it help cook the pasta faster? If not, find out in this science fair project idea.

Find out whether a longer airplane will fly farther or a wider paper airplane.

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

Start your toy engines -- this is going to be a fast and friction-filled race!

Gymnosperms are coniferous trees that reproduces using pine cones to spread seeds. Check out this simple pine cone experiment to learn about the process!

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

In this science fair project, kids will be able to see where germs reside on their hands while gaining insight into the benefits of thorough hand washing.

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.

Spiders don't go to grocery stores or fast food chains to get their food -- they set up traps and wait for their food to come to them!

Test whether plants can grow without sunlight and water.

This experiment has students record rat behavior to learn about the benefits of rats and research rat myths throughout history.

This science experiment has students test whether a snail moves faster on concrete or dirt.

It's rhyme time! With this science fair project idea, your child will find out which words can be considered easy rhyming words, and why.

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