This science fair project idea highlights decomposition rates by comparing how long it takes an item to decompose in a compost pile vs. a landfill.

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

In this cool science experiment, learn about magnetism and poles, and test magnet strength to find out if two magnets are twice as strong as one.

Create a self-portrait from natural materials in this collage craft activity!

This project compares the strength of one, two, and three-ply toilet paper.

The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.

In this activity, your child will be challenged to use simple materials to create a catapult for a small, lightweight toy.

The objective of this science fair project is to examine the basic principles of air pressure using simple materials like a balloon, straw and string.

Science fair project that examines how to grow bacteria in a controlled setting, using simple materials from around the home.

Kids make a paperclip perform an act of magnetic levitation and test how effective various materials are at magnetic shielding in this science fair project.

Understanding absorption means understanding why certain fibers and materials can absorb water! Kids will see absorption in action in this simple project.

The objective of this science fair project is to experiment with balancing everyday objects and observing the the effects of gravity on materials.

This is a fantastic and easy science experiment where kids will learn about elasticity by testing how high bouncy balls of different materials can bounce.

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.

In this activity your child will make a coiling snake out of simple household materials, and also find out why they coil.

In this science experiment, do tensile strength test on fishing line, a strand of hair, a rubber band, and any other materials you're curious about!

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

Invite your fifth grader to test the different rates of liquid absorption in synthetic and cotton materials, such as nylon and cotton.

Using simple materials found around your home, you can reinforce the static electricity concept by helping your child build a simple device with zapping power!

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

By incorporating natural materials and the powers of observation, your child will become a backyard naturalist while building early writing and drawing skills!

Milk is made of water and fat; but how can you separate the two? Find out in this color changing milk experiment.

This science fair project compares the allelopathic affects of juglone, a chemical agent produced by the Black Walnut tree, on two plants.

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

In this open-ended activity, students will be given a small quantity of three types of materials and asked to design a prototype for “something that will improve the school.”

Is it solid or liquid? Create oobleck and witness the amazingly weird oscillation between the two!

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

Show your fifth grade scientist how to create a siphon using two buckets, plastic tubing, and water. Watch her astonishment as the water travels uphill!