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

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

Can you dig it? This science experiment isn't for kids who like to keep their hands clean.

This science fair project idea investigates the hardness property of minerals.

What do worms eat? Kids find out what kinds of rotting leaves and vegetables worms prefer in this cool compost science fair project.

Learn how to make a food pyramid with animals in a a coniferous forest ecosystem around your home.

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

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 idea examines whether adding gelatin causes a solid to have a higher melting point and/or melt slower.

Which music genres have the fastest tempos? The slowest? This experiment determines if there's a relationship between beats per minute in a song and its genre.

This science fair project idea explores if the length of the string that an object is suspended on has an effect on how fast or slow it swings.

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

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

In this project children practice the scientific method while playing with puffy paint.

Find out whether a longer airplane will fly farther or a wider paper airplane.

Wiggly worms are known for staying buried in the soil, but how does that affect plants? Are earthworms and plant growth related?

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.

Ever wonder why refrigerator lights turn off when you close the door? Does the darkness prevent food from spoiling? This experiment, determines just that.

Certain fruits can change gelatinâs ability to set. In this experiment, kids will discover what happens when gelatin meets pineapple enzyme.

This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

In this science fair project, students examine under what conditions individual plants release seeds and how far the seeds are released.

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 science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

Young scientists will investigate people's preferences for saltiness, and make some inferences about genetics and diet.

Will storing cucumbers and tomatoes in the fridge destroy their unique flavors? Find out in this science fair project idea!

This science fair project idea investigates if fats add to the flavor of food.

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

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

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

This science fair project idea investigates if webbed feet help a duck (and others) swim.