Start your toy engines -- this is going to be a fast and friction-filled race!

Can you imagine a sky filled with bright, colorful bubbles? Make this whimsical scene come alive with bubble science!

This science fair project idea explores the egg's thin membrane.

Discover whether different amounts of water added into a wine glass will produce a different pitch when their fingers are rubbed along the rim.

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

This science fair project will help students learn about non-vascular plants, such as mosses.

This science fair project idea explores plant growth from a bulb, root, and a stem and investigates asexual plant reproduction.

This science project teaches students the relationship between compost and plant growth. Students conduct an experiment with different types of compost.

In this experiment, students find out what happens when a less-dense fluid interacts with a denser one, replicating the effect of cooler solid rock on magma.

In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

In this experiment we will be determining whether birds prefer certain colors of seed.

Science fair project that identifies the differences between soils from different environments and attempts to figure out why those differences exist.

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

What keeps a an item cooler, polymer crystals or ice? Find out in this cool science experiment!

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

In this simple science project, learn about what causes dew and what affects dew formation with a drinking glass, ice, and a soda bottle.

Did you ever add salt to pasta? Did it help cook the pasta faster? If not, find out in this science fair project idea.

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

This science fair project on testing water hardness is a great introduction to practical chemistry. Test and learn the difference between hard and soft water.

In this project students experiment with making music using only glasses of water.

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

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

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

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

This science fair project idea creates a sedimentary rock and to investigate what takes place during the rock cycle.

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

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.

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.

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

Check out this cool science fair project idea that models the behavior of the cold desert plants: xerophytes and halophytes.