This science experiment tests why guacamole goes brown and if leaving the pit in will stop guacamole from turning brown.

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

This science fair project idea investigates whether air has mass and weight.

This science fair project idea's objective is to become familiar with items your family regularly throws in the trash.

This science project lets students explore the number of spots on a ladybird and how to treat ladybugs with respect.

This science fair project idea demonstrates how air resistance contributes to denser objects falling faster than less dense objects.

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

Children will learn why and how to compost as they help with the process of filling their compost, turning it, and observing the changes that occur.

The project investigates how water and movement affects erosion.

This science fair project idea investigates which objects float and sink in honey, water, and oil.

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

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

This project explores whether plants can live and grow when "watered" with juice, soda, or milk.

Learn about this simple machine and make a pulley of your own to use for fun science trials.

The concept of metamorphosis is fascinating to children of all ages. Help your child's creativity take flight as she makes her very own butterfly life cycle.

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

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

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

Science fair project that develops latent fingerprints on a non-porous objects by converting superglue from a solid state to a gaseous state.

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

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

Get your hands on a concoction that breaks the rules about what's a solid and what's a liquid.

Chemistry is a blast with this backyard bomb made from a sandwich bag. All you need are ingredients from the pantry to create a satisfying, and safe, explosion.

Think you can blow up a balloon without using your mouth? This isn't just a cool trick, it's also a great way to introduce chemistry and biology concepts.

Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.

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.

This project determines whether Styrofoam, paper, or plastic cups are best for preventing ice from melting.

In this science fair project, kids will be able to see where germs reside on their hands while gaining insight into the benefits of thorough hand washing.

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

Science fair project that demonstrates the effect of detergent pollution on fresh water birds' ability to stay afloat.