The buoyant force of water explains why some objects float in water. But why do some objects sink? Find out in this physics experiment and learn about density.

This project examines Newton's First and Second Laws of Motion with a bicycle and water balloons.

Does putting soapy water on plants help or hinder plant growth? Kids learn about greywater and how it affects plant growth in this cool science fair project.

Students pit the heat capacity of water against the heat capacity of oil while looking at the effects of dipole rotation in this cool science fair project idea.

Science fair project the demonstrates Newton's Third Law using a milk carton filled with water.

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 project, you will observe and record changes in sunspots over two weeks.

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

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

Science fair project which identifies the most effective insulator that you could use to make a winter coat by comparing how well cloth and cotton trap heat.

Science fair project which determines whether plants are able to get enough nutrients from different types of garbage.

This middle school science fair project determines whether DNA is most easily extracted from under-ripe, ripe, or over-ripe strawberries.

Check out this cool science fair project on identifying rocks and minerals for kids.

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

What is vegetative reproduction? Find out how you can clone plants and regrow cabbage from a stem in this cool experiment!