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This science fair project explores different types of endangered frogs, and why some are endangered while others are not.

What's the best way to make DIY compost? Kids will learn about aerobic and anaerobic decomposition while learning to appreciate the value of composting.

Observe corn seed germination to learn about dicots and monocots and how plants grow from seeds to seedlings to full-grown plants!

What heats up fasterâwater or soil? 5th grade students test the specific heat of water against the specific heat of sand in this great science fair project.

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.

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

In this free science fair project idea, kids will conduct an easy electrolysis of water experiment to test solutions of salt, baking soda, tap water, and more.

This science fair project idea determines what household items are good conductors of electricity.

Use a dichotomous key to identify plants or animals.

Science fair project idea that measures fuel efficiency in cars. Calculate cost per mile by comparing fuel cost and consumption data.

Kids will love making sugar crystals in this sugar crystal science fair project which teaches important chemistry concepts like saturation and solubility.

This project examines the affect of temperature on viscosity and surface tension of different liquids.

This science fair project determines which of two chemical agents can be used to release the drug (tea) from hydrogel crystals.

This science project researches the correlation between barometric pressure and wind velocity.

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

Most people assume that cold water freezes more quickly, but could that be false? Does hot water freeze faster than cold water? Let's find out!

Word color association is just a fancy way to talk about the way we connect colors with words.

Spiders don't go to grocery stores or fast food chains to get their food -- they set up traps and wait for their food to come to them!

You've heard all about oil spills, but can they really be that bad? After all, vegetable oil is in almost every yummy baking good from cookies to brownies.

Is it amplitude? Weight? Length of string? Kids will discover what factors changing the period of a pendulum depends on in this fun and easy physics experiment.

Science fair project determines relationship between number and variety of insects and spiders by collecting and counting invertebrates in a ecosystem.

Science fair project in which you will attempt to throw a ball the greatest horizontal distance possible by using different angles.

Kids make strong bubbles to investigate the effect different additives have on bubble life in this cool science fair project idea.

Why do plants wilt? Kids will learn to think critically about what environmental factors affect plants, and what plants need to survive.

In this cool experiment, learn about the forces of resistance in a liquid and race marbles in a cylinder to find out which fluids have a high viscosity.

In this windmill model science project, you will build a windmill to learn about wheel-and-axle machines and how these simple machines are used to do work.

Do you have your isopods straight? Learn about sow bug and pill bug behavior by building a terrarium to study them in!

In this wind tunnel experiment, you'll make a wind tunnel to test lift and airflow on a model plane and explore aerodynamics and the Bernoulli Principle.

In this simple circular motion experiment, you'll observe tangential velocity and learn about how acceleration and centripetal force affect an object.

Kids will enjoy this cool demonstration of Newton's Third Law and the conservation of linear momentum.