This science experiment explores why leaves change color in the fall and the role of photosynthesis in leaf coloration.

Save money by making compost! Use this science fair project idea to determine which composting methods best encourage decomposition of organic matter.

This optics-based science fair project idea teaches kids about real and virtual images with a mind-bending candle illusion inspired by Pepper's Ghost.

This project will explore whether music influences physical endurance.

The purpose of this science project is to determine which chemical best lowers the temperature of water in a cold pack and if the amount affects its use.

Blend art and science in this hands-on activity that shows your kindergartener how primary colors combine to make secondary colors.

Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.

Science fair project that compares the ecology of different soil samples by identifying which sample has the most invertebrates living in it.

This science fair project idea uses the process of chemical weathering to change a mineral.

Kids learn about examples of mechanical weathering and conduct an experiment with seeds and plaster in this cool geology science fair project idea.

This science fair project idea studies which brand of wintergreen candy produces the most sparks in the dark.

This science fair project idea explores substances that cause a bubble to last longer.

Do dogs understand English? Kids will find out with one of our favorite dog science fair projects that tests how dogs process human language and other cues.

Find out whether freezing or refrigerating destroys more bacteria. This is essential to consuming safe and germ-free food.

This science fair project idea investigates how different disinfectants work in killing germs.

This science fair project idea researches the different layers of the atmosphere and creates a visual representation of the atmospheric layers.

Explore properties of liquids and how temperature and salinity effect surface tension of liquids in this fun- filled science fair project idea.

In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!

Create a colorful, informative display that illustrates the properties of blood cells. Prepare slides using samples of fresh raw beef or chicken bone marrow.

Which type of sunglass lenses gives you the best protection from the sun's harmful UV rays? Find out in this cool science project!

This science fair project idea explores how the shape of a boat affects its density and how much weight it can float.

Take a closer look at your furry friend (or the furry friend of a neighbor -- with permission) to discover if communication exists between cats and humans.

Soil is made up of different layers. How far down do you need to dig to find the soil horizon, or the place where bits of leaves and branches become soil?

This science fair project demonstrates the "power of conformity".

This science fair project idea investigates the relationship between memory and age.

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

examine how passive solar heating works, measure temperature in a parked car on a sunny day. ways to use passive solar heating as an alternative, energy

This science fair project idea compares whether ionic dryers leave hair in better condition than non-ionic dryers.

Learn whether Mylar Balloons last longer than Latex Balloons or vice versa.

Science fair project that helps you create your own compost pile in order to test the efficiency of different methods of composting.