In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

Can a horse lead itself to the carrot? Train your horse with carrots and boxes and test horse memory in this fun zoology science fair project.

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

Check out this cool science project idea to learn about rocks and explore the cycles of formation, breakdown, and reformation of rocks in the Earth's crust.

This fun and easy middle school science fair project idea explores the topic of pollution and demonstrates if polluted soil affect the growth of green plants.

In this science fair project, students learn how pressure can make the minerals in a rock line up in the same direction and form bands and foliation.

In this cool science experiment, learn about magnetism and poles, and test magnet strength to find out if two magnets are twice as strong as one.

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.

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.

Make a backbone model to explore human anatomy and life science.

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!

This science fair project teaches students the differences between fruits and vegetables.

This science fair project examines how seeds hitchhike on animals and clothing.

Saturn is the ringed planet in our solar system, a gas giant with rings made of ice and dust. Let's make a cool scale model with an old CD and some glitter!

This science fair project teaches students about wilting and browning of salad greens.

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

This science fair project idea examines the reason boats are shaped and engineered.

This science fair project idea examines whether boys and girls differ in reflexes.

This fun experiment provides a concrete and visually striking illustration of photosynthesis.

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

Could there be toxic chemicals lurking in the cupboards and closets of your home?

This science fair project idea investigates the difference in reaction times between boys and girls.

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

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

Play with balance and simple engineering as you hurry to create a sturdy rock tower.

This science fair project idea provides evidence that air is everywhere and takes up space.

This project explores whether plants can live and grow when "watered" with juice, soda, or milk.

In this science fair project, young children notice and track changes in trees throughout the year.

The objective of this science fair project is to explore the relationship between acidic and basic compounds.

This simple heat transfer experiment is a great introduction to the concepts of heat transfer and conduction.