How well can people recall what they have observed. Test your knowledge in this fun experiment.

What is surface tension? Kids will discover how water-skating insects use surface tension to keep from sinking by making a model water walker.

Science fair project that demonstrates the effect of detergent pollution on fresh water birds' ability to stay afloat.

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

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

Examine which metal conducts more heat by boiling water in 3 pans made of aluminum, copper, and stainless steel.

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 does a compass work? What's a magnetic field? Kids will build their own compass at home to find the answers in this great science fair project idea.

In this fun science project, learn about what happens to cut fruit and experiment with how to stop apples from turning brown.

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

Do different types of oil mix or stack? Find out in this science fair project idea!

In this fun design challenge, your child will get creative with making structures out of toothpicks and gumdrop candies.

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.

Learn how to demagnetize a magnet and how physics can explain this phenomenon with this enlightening science fair project.

Challenge your learner to design and build a city of their own in this creative engineering activity.

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

Learn about the layers of the Earth and make a model! Create a earth layer book, cake, or clay diagram.

This science fair project will help students learn about non-vascular plants, such as mosses.

In this science fair project, kids observe the expansion of liquids when frozen and determine if some liquids expand more than others in the freezing process.

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

In this outdoor science activity you'll find tips on how to create a nature journal by choosing a native plant or animal and tracking that species.

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

Ever wonder why refrigerator lights turn off when you close the door? Does the darkness prevent food from spoiling? This experiment, determines just that.

This project determines whether Styrofoam, paper, or plastic cups are best for preventing ice from melting.

This project compares the strength of one, two, and three-ply toilet paper.

This science fair project idea researches the different layers of the atmosphere and creates a visual representation of the atmospheric layers.

This science fair project idea determines if the color of light affects the growth of plants.

This science fair project idea explores how enzyme inhibitors, active sites, non-competitive enzyme inhibitors, and substrates work.

Wiggly worms are known for staying buried in the soil, but how does that affect plants? Are earthworms and plant growth related?