This science fair project idea investigates how optical distances change the apparent size of an object as seen through a magnifying lens.

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

This science fair project idea determines which method of hand cleansing is the most effective.

The purpose of this science fair project is to demonstrate how yeast, a fungus, causes bread to rise.

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

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

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.

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

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.

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

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

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

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.

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

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.

Check out this cool science fair project idea that models the behavior of the cold desert plants: xerophytes and halophytes.

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!

Will increasing the amount of salt in water effect how slow or fast the water freezes?

Handedness and footedness refer to whether people prefer to use their left or right hand and foot. In this experiment, test hand and foot dominance.

What's the best way to make DIY compost? Kids will learn about aerobic and anaerobic decomposition while learning to appreciate the value of composting.

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

This science fair project idea investigates the ability of different whitening toothpastes to whiten teeth.

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.

In this plastic wrap science fair project, you'll learn about polymer permeability and find out which plastic wrap keeps food from dehydrating best.

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

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.