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

Use chemical analysis to identify a variety of mystery powders that look the same but actually have very different properties.

In this windmill model science project, you will build a windmill to learn about wheel-and-axle machines and how these simple machines are used to do work.

Sink or swim? Calculate the density of various fruits and vegetables using water and a kitchen scale.

Kids will create their own version of Richard Feynman's rubber band heat engine to learn about thermodynamics with this cool science fair project idea.

This science fair project idea measures the growth of bread dough and finds out how long it takes for the dough to stop rising.

Kids will learn how to measure the viscosity of liquids by making their own homemade viscometer in this great science fair project idea.

The objective this science fair project is to determine whether a bigger bag will allow a homemade hot air balloon to fly higher than smaller bag.

Have your child kick off their summer vacation by making a miniature water slide!

This science fair project idea builds models of various types of bridges and then determines which bridge design is the strongest.