In this air pressure science experiment with a balloon and a jar, children will use heat to create a partial vacuum and suck a balloon into a jar.

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

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.

In science fair projects, middle school students discover why nitrogen fixing bacteria are important to plant growth.

This cool science fair project teaches kids about temperature, density and buoyancy using balloons that float with normal air. No helium required!

Have fun with bubbles and find out why there are bubbles in your tap water in this cool science fair project idea.

Kids learn about potential energy, and mechanical energy, and how to make power from water with one of our favorite renewable energy projects for kids.

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

Can cells be frozen? This science fair project provides information to answer this question.

The goal of this middle school science fair project is to examine the effect of caffeine on plant growth.

This fun middle school science fair project idea helps student discover the concepts behind deep sea diving and how Cartesian divers work.

How do animals keep warm? In this experiment, find out whether fat insulation resists cold temperatures and learn how this works in the animal kingdom.

Science fair project idea that measures fuel efficiency in cars. Calculate cost per mile by comparing fuel cost and consumption data.

Check out this fun science fair project idea for middle school students to learn about the effects of temperature on the density of a gas such as air.

Check out this fun science fair project idea to learn how alkaline batteries convert chemical energy to electrical energy?

Science fair project that examines the effects of soap on the surface tension of water. How does soap affect the surface tension of water?

In this science fair project, young children notice and track changes in trees throughout the year.

In this science fair project, kids start a chemical reaction that will make a balloon inflate itself!

Observe which kind of fresh long-stemmed flower will last the longest after being picked.

Science fair project that demonstrates how a rainbow forms, by using water to split white light into its many colors.

How does salinity affect the point at which water freezes? Kids will find out by performing this cool melting ice experiment.

This science fair project idea explores whether boiling and freezing water will have an effect on how much it weighs.

This project explores the effectiveness of various common household ingredients in cleaning tarnished and oxidized coins.

This science fair project investigates what type of cookie sheet bakes the best cookies.

Measure the porosity of rocks by submerging them in water. Measure how much water each rock "drank," by measuring the difference in water volume.

This science fair project idea models industrial oil spills and determines if they have an impact on wildlife living beneath the surface of the water.

Most people assume that cold water freezes more quickly, but could that be false? Does hot water freeze faster than cold water? Let's find out!

This science fair project idea attempts to train a worm to complete a simple maze in order to find out if worms can learn and remember.

It's not actually that hard to get energy from garbage! Kids learn how to make biogas in the form of methane with this cool and easy science fair project idea.

In this cool experiment, learn about the forces of resistance in a liquid and race marbles in a cylinder to find out which fluids have a high viscosity.