Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

Experiment about connection of senses of taste and smell. Using blindfold and noseplugs, administer blind taste test. Analyze results and organize data.

Slime: It's oozy, it's goopy, and it's just plain fun! Learn how to make slime with this fun science fair project.

Do earthworms like moisture or darkness? Find out as we explore the relationship between earthworms and light.

This light bulb science project includes step-by-step instructions for testing the heat from different light bulbs.

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

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

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

This science fair idea examines hydrogel superabsorbent polymer crystals. They can absorb 500 times their weight in water. Can they absorb other liquids too?

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

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 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.

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

Is it possible to trick the forces of nature that make your bubbles round to create a square bubble?

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

Use pepper and soap to discover some fun facts about the properties of water.

Test your friends to find out if you can replicate the placebo effect's incredible results.

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.

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.

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

This science fair project idea discovers whether there are some objects that do not fall at a constant rate.

This science fair project idea investigates if heat from direct sunlight is hotter than heat from reflected sunlight.

This science fair project idea experiments with spinning color wheels and optical illusions.

The goal of this science fair project is to analyze differences between the taste and texture of frozen and fresh food.

This science fair project idea explores whether white light can be separated into different colors.

Check out this fun science fair project to make a vinegar and baking soda balloon and demonstrate how gas is created as a result of the chemical reaction.

What's the relationship between temperature, air humidity and static electricity? Kids will find out with this free static electricity science fair project.