This classic children's game demonstrates how sound travels through air vs. through a solid.

Gymnosperms are coniferous trees that reproduces using pine cones to spread seeds. Check out this simple pine cone experiment to learn about the process!

In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

Science fair project idea which teaches you how to make butter by separating cream into butter and buttermilk.

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

Science fair project about work and energy which uses a simple mathematical formula to predict how far a jar will roll down an incline.

Check out this fun science fair project idea for 1st grade: a solar eclipse model that demonstrates total, partial, and annular solar eclipses.

This science experiment tests if dog saliva can really help heal wounds.

Find out whether packaged seeds actually do expire in this new science fair project idea.

Can you fool your eyes and your brain with an optical illusion? The purpose of this science fair project is to demonstrate various kinds of optical illusions.

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

In this experiment you will replicate the mummification process by making a hot dog mummy.

Demonstrate the properties of pressure and surface tension to explain how water can stay inside an upside down glass using cardboard.

Design a survival kit. Brainstorm various survival scenarios. Address basic human requirements and natural resources. Describe each tool as well uses.

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

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

What is the best stain remover for clothes? In this fun and easy science fair project idea, students will identify the best method for laundry stain removal.

This science fair project idea explores how enzyme inhibitors, active sites, non-competitive enzyme inhibitors, and substrates work.

In this science fair project, young children discover what happens when two fluids that have different densities get together.

In this experiment, students will create their own version of coquina, a sedimentary rock thatâs formed by seashells and sand, cemented by seawater minerals.

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

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

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.

This science fair project idea provides evidence that air is everywhere and takes up space.

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.

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

What chromosome combinations determine a fetus gender? Use probability to think about whether a sperm and ovum will create a male or female in this project.

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

The goal of this science fair experiment is to demonstrate the effects of air pressure on objects and analyze applications of air pressure principles.

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