This science fair project demonstrates the principles of reflection through simple experiments involving mirrors and light.

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

Is cleaning with lemon effective? Get ready to give this science project some elbow grease and find out if acidic lemons can be used as a cleaning agent.

Science fair project that examines how winter storms form and the relationship between temperature, moisture and snow.

The objective of this science fair project is to test the growth rate of a plan in a crystal medium in comparison to traditional soil.

In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

Is horse manure a possible energy source in a crisis? Use calorimetry to find out how much energy horse manure can produce in this science fair project.

This project examines what types of objects burn and which burn faster and cleaner.

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

Have your kid determine if a goldfish can be conditioned to expect food the same way Pavlov's dogs did with this fascinating science fair project.

Future engineers, unite! Discover how to keep a sandcastleâs bridge from falling into the moat.

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!

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.

What are buttress roots? In this fun science project, make a model of a rainforest tree and learn how they help trees survive in the tropical rainforest!

Ant behavior is closely related to light intensity. This free science fair project idea examines how fast ants dig when they are exposed to to light and dark.

The purpose of this science fair project is to build a basic radio.

Crayons aren't just good for creating colorful masterpieces -- they're also great for science!

Determine which kind of rock (igneous, sedimentary, metamorphic) has the greatest reservoir capacity, which is the ability to hold the most oil and natural gas.

This science project lets students explore the number of spots on a ladybird and how to treat ladybugs with respect.

You've heard all about oil spills, but can they really be that bad? After all, vegetable oil is in almost every yummy baking good from cookies to brownies.

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.

This science fair project idea explores substances that cause a bubble to last longer.

In this experiment, you'll make a seafloor spreading model to learn more about how plate tectonics work and create mid-ocean ridges.

Science fair project which simulates the global conveyor belts on a small scale, and observes the effects of wind, density and temperature on water movement.

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

Discover whether the â5-second ruleâ is effective at determining whether food is still safe to eat after being dropped on the ground.

In this classic Ivory soap experiment, kids learn what happens to different types of soap in the microwave, and why!

This science fair project demonstrates the magic of arches by challenging students to stack telephone books on top of eggs without breaking them.

What is persistence of vision? With this hands-on science fair project idea, students will demonstrate this cool and dramatic phenomenon in their own classroom.