The rock cycle will come alive for your child when he uses broken crayons to create the three basic rock types.

In this experiment, recycled objects are separated to demonstrate how mixtures are made and the variance in the physical properties of their ingredients.

What do worms eat? Kids find out what kinds of rotting leaves and vegetables worms prefer in this cool compost science fair project.

Get a cool science fair project idea for middle schoolers on the effect of adding sugar to the growth of green plants.

What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.

Learn how to make a food pyramid with animals in a a coniferous forest ecosystem around your home.

In this insulation experiment, you'll learn which clothes keep you warm in the cold, and which make you shiver.

Can a horse lead itself to the carrot? Train your horse with carrots and boxes and test horse memory in this fun zoology science fair project.

Look for a correlation between temperature and the intensity of cricket chirping. Measure ambient temperature and sound intensity in decibels.

Free science fair project idea that measures change in flexibility with age, using a variety of flexibility tests like Sit & Reach.

This project involves the programming and development of a 3D Rubik's Cube application using C++.

Make a seed bomb and let your junior guerilla gardener spread flowers far and wide.

This science fair project idea produces varying pitches of sound.

Get a fun high school physics science fair project idea one of the states of matter called plasma and the applications of this unique coil.

In this cool experiment, learn how to find specific gravity of minerals using liquids of different densities to see which substances and items sink and float.

This science fair project idea demonstrates that light travels in straight lines and experiments with reflecting light.

Determine whether fresh vegetables have more calories or less calories than canned vegetables.

Investigate which substances are most effective at removing salt from water.

In this science experiment, test the pH of soil surrounding a gas station to determine if gas stations have a negative effect on the environment.

This science fair project idea attempts to train a worm to complete a simple maze in order to find out if worms can learn and remember.

This science fair project introduces children to static electricity and the idea that electricity is more than lights and plugs.

Help your kindergarten scientist explore an important part of earth science: how soil retains water.

This project explores how well couples convey complex emotions such as envy and pride to one another solely through the sense of touch.

In science fair projects, middle school students discover why nitrogen fixing bacteria are important to plant growth.

Science fair project which determines whether your current calorie intake will cause you to lose or gain weight over time.

This science fair project idea examines whether adding gelatin causes a solid to have a higher melting point and/or melt slower.

Which music genres have the fastest tempos? The slowest? This experiment determines if there's a relationship between beats per minute in a song and its genre.

Check out this fun science fair project idea to explore fun facts about fruit juices and learn why do juices turn bad in the fridge.

In this simple and social activity, children use size comparison skills to find objects in nature that are bigger, smaller, longer, and shorter.

This science fair project idea explores if the length of the string that an object is suspended on has an effect on how fast or slow it swings.