Why are some pennies shiny and others dark and dull? Find out with this cleaning copper coins experiment, which transforms dark pennies to bright ones.

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

In this science fair project, students will use four different household objects to see which ones form the most or best crystals.

Science fair project which will teach you more about the foods that you eat, and learn which ones are healthier choices.

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

Measure the speed of the earth's rotation using protractors and meter sticks. This science fair project measures the angle of the sun in relation to earth.

How to test for acids and bases? In this activity you and your child can make your own indicator from red cabbage!

Plants help keep a house cool! This article includes step-by-step instructions for completing this fun and interesting science experiment.

This experiment will use computers to examine how the famous Mandelbrot set can be manipulated in fractals.

Here's an experiment that will have your child experimenting with cake ingredients to learn about the chemical reactions that happen when a cake's in the oven.

Discover whether a metal will expand under hot water.

This science fair project uses paper chromatography to investigate whether black, brown, orange, and purple are pure colors or mixtures of other colors.

Is it solid or liquid? Create oobleck and witness the amazingly weird oscillation between the two!

In this experiment, recycled objects are separated to demonstrate how mixtures are made and the variance in the physical properties of their ingredients.

Is exercise a cellular activity? Check out this fun science fair project idea to compare the carbon dioxide production before and after exercise.

Will people perceive your intelligence differently depending on your hair color? Find out in this science fair project idea!

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

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.