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.

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.

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.

This experiment investigates the relationship between the temperature of a candle and its burn rate.

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.

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.

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

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

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

This experiment evaluates if a noisy environment makes it harder for test subjects to perform tasks that require hand-eye coordination.

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

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

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

In this challenge, students are tasked with creating a car that can be powered by a balloon!

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

In this challenge, students are tasked with creating a model roller coaster that a marble can travel through.

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