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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.

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.

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

What happens when "coffee-addicts" miss coffee for 1 day? Find out in this science fair project idea!

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

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