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Start your toy engines -- this is going to be a fast and friction-filled race!

Science fair project that compares the biodiversity of fungi in different ecosystems by identifying species of fungi.

What is a wedge? Kids find out by experimenting with different wedges in this simple science fair project idea.

Here's an easy experiment that lets your first grader practice the scientific method, while watching a caterpillar eat.

This science fair idea is a great way for kids to explore static electricity. Kids will give a comb a static charge and watch as it separates pepper from salt.

The objective of this science fair project is to set up a compost bin to convert food scraps and organic waste.

In this science fair project, young children notice and track changes in trees throughout the year.

This science fair project idea investigates if webbed feet help a duck (and others) swim.

Learn about the power of exponents. The objective of this science fair project is to explore and understand how exponents are used.

This project examines what types of objects burn and which burn faster and cleaner.

Would it hurt to skip brushing your teeth just this once? Let's find out by seeing which foods produce the most mouth bacteria.

Kids will learn how to show the direction of magnetic field lines and create a permanent model using iron filings in this great science fair project idea.

Learn how to make a hygrometer to measure relative humidity in this project. Make a sling psychrometer hygrometer with gauze, thermometers, and a bottle.

This science fair project idea explores whether cats can be trained in the same way that dogs can.

Demonstrate how you can make your own compass using a magnetized needle. It also allows you to compare magnetic north and geographic north.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

This science fair project idea explores alcoholic fermentation at work by making your own soda.

Science fair project which tests various sedimentary, igneous and metamorphic rocks to find out whether one rock family is stronger than the others.

In this cool project, create a lighted, scale model of the different layers of the Sun, including the core, radiation and convection zones, and photosphere.

Science fair project that identifies the differences between soils from different environments and attempts to figure out why those differences exist.

Kids will build a turtle habitat in order to observe the climate preferences of this cold-blooded reptile.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

Try this fun garden graphing project with your kindergartener this summer to give him a leg up in math and science while spending some valuable time outdoors!

In this science fair project, students examine under what conditions individual plants release seeds and how far the seeds are released.

Kids will discover the meat science behind the meat they eat, and find out how to use safe chemistry to make meat more tender.

With this science fair idea, little scientists will gain valuable insights into the physics behind throwing a baseball.

This science fair project examines which fruits and/or vegetables will ripen prematurely when placed with ripe apples.

Soil is made up of different layers. How far down do you need to dig to find the soil horizon, or the place where bits of leaves and branches become soil?

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

For your budding first grade scientist, all you need is some simple, natural materials to create an amazing ant farm. Here's how to get started.