This is a quick, easy science fair project that conveys the idea of density to upper elementary students.

What's a liquid? What's a solid? What better way to experiment than by turning a childhood favorite, ice cream, into a homemade science lesson!

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 free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.