Air invisible; it doesn't make sounds; you can't pick it up and throw it. So how do we know it exists? Help your second grade scientist figure it out.

Your third grader will delight in learning about sound waves as he observes the different sounds created by tapping on glasses with varying amounts of water.

This activity works well with a group or just with a parent and child, and it can make a great party game since it's both fun and inexpensive.

This science fair project idea studies whether eating a hearty breakfast before and exam will get them better test scores.

In this experiment, your middle schooler will chart the effects of oil on a feather in order to grasp the tragic effects of oil spills on wildlife.

This science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.

This science fair project idea quantifies the effect of weather- in this case temperature and humidity- on musical instruments.

There is debate about whether chalkboards or whiteboards are better. This experiment explores which leads to better retention of visually-displayed information.

In this activity, you'll send your kindergartener on a scavenger hunt to find sounds and create a sound recording. Here's how!

Devise an argument for or against the possibility of resurrectin extinct species through DNA manipulation. Analyze data, report findings.

Does your middle school teenager have good reflexes? Gauge his reaction time in this science and math activity that requires only a yardstick and a friend.

This experiment explores whether reading text on a computer screen or type on paper leads to better retention of the information read.

It's easy to plant your own in-home container garden! This planter contains pizza-themed herbs and is a perfect early gardening activity for kindergarteners.

The goal of this science fair project is to evaluate the effect of heat on sound wave frequency.

The next time you've got a restless second grade earth scientist on your hands, use this experiment to demonstrate crystals and make a tasty treat, too!

In this fun experiment, learn about brand awareness and the influence of media on children by testing logo recognition in different age groups.

What's the science behind those out-of-sight roots? Find out if you can trick roots into growing in different directions.

Give your local birds a treat — and your young birdwatcher some fun — with this simple DIY bird feeder.

What is biodiversity? Kids will study different areas of their backyards to see which is the most diverse to learn about biodiversity and random sampling.

Experiment with fermenting various fruits, grains or syrups. Describe and illustrate the fermentation process in a detailed report.

This project researches whether the type of land use affects the water quality of Queenstown Creek.

Check out this cool middle school science fair project idea to find the difference between organically grown and commercial brands of foods.

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.

Science fair project that determines whether disinfectant sprays or disinfectant soaps are more effective at removing bacteria from hands.

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

Dig into the physics of pool to explore some cool applied math and learn about what happens in an elastic collision of equal masses.

This science fair project idea focuses on the use a conductivity device to determine the ionic concentrations of hard water.

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

The goal of this science fair project was to examine how different angles of decline affect the tipping point of a vehicle.