The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

Get your hands on a concoction that breaks the rules about what's a solid and what's a liquid.

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

Teach your child how butter is created by shaking up cream the old-fashioned way.

In this fun science fair project idea learn about universal solvents and solutes and find out the solubility of several common liquid substances.

Encourage your child to think outside the bathtub by making her very own handmade soaps! Perfect as a present, a decoration, or just to pamper herself.

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

In this science experiment, your child will test the strength of hollow structures in order to understand how strong bird bones really are.

Based on the concept of water's "freezing point," this activity entails the lowering of water's freezing point to chill ice cream!

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

Get your fifth grader involved in some earth science by helping her plan and create her very own rock collection.

This Mother's Day, mix in some fifth grade science learning to create this fabulous fudge!

This science fair project idea experiments with spinning color wheels and optical illusions.