In this air pressure science experiment with a balloon and a jar, children will use heat to create a partial vacuum and suck a balloon into a jar.

Do you think you could walk around upside down -- with your feet in the air and your head on the ground?

In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

This fun experiment provides a concrete and visually striking illustration of photosynthesis.

Step into the fantastic world of colors with a project that explores what shade you -- and your friends -- like best.

Why doesn't the ocean freeze? Students answer this question by simulating the chemical composition and temperature of arctic waters in their own home.

Test whether plants can grow without sunlight and water.

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.

This science fair project teaches students the differences between fruits and vegetables.

There are many benefits to bugs and insects. This science project shows how cockroaches, termites, and other critters benefit our planet.

Study the life cycle of the common blowfly as it relates to forensic investigation. Record the first time you see flies, maggots, and eggs.

How do organic materials become soil? This science experiment measures what materials biodegrade.

This experiment has students record rat behavior to learn about the benefits of rats and research rat myths throughout history.

In this science fair project, students learn how pressure can make the minerals in a rock line up in the same direction and form bands and foliation.

Children have a naturally inquisitive mind. Foster their curiosity with a walk through an autumn field or park to answer age-old “why” questions. As you walk with your child, you can encourage them to ask questions.

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

Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.

Science fair project which determines whether the size or the thickness of a piece of paper has an effect on how many times it can be folded in half.

Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.

In this science fair project, students use the streak test to tell minerals apart from each other.

In this science fair experiment, children demonstrate the relationship between the amount of stuff and the amount of pressure in a closed system.

Discover whether cold or hot water from the faucet will boil faster on the stove.

In this sound experiment children listen for differences as they tap on a bag of air, a bag of water, and a wooden block held up to their ears.

Using a toy race car kids create a visual model of the Doppler Effect.

This experiment challenges students to forecast the weather based on the surrounding areas' weather.

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

Find out whether soil amendments can improve soil conditions and help you grow a bigger beanstalk in this ecology experiment!

In this experiment, your child will create two compost bins and see if he can determine what attracts fruit flies.

This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.