This project investigates several commercially decaffeinated tea types (black, green, oolong, white) for the presence of detectable traces of caffeine.

This science fair project idea examines the reason boats are shaped and engineered.

Science fair project that compares leaf pigments of various tree species. Which tree species do you think will have the most pigments and why?

This science fair project explains the process of how the lungs expand and contract with the help of the diaphragm.

Research basic components of vacuum cleaners, consult vacuum cleaner manufacturers for advice. Design vacuum with attachments that change automatically.

You've heard all about oil spills, but can they really be that bad? After all, vegetable oil is in almost every yummy baking good from cookies to brownies.

This science fair project examines whether ocean water can be made safe to drink.

Why doesn't the ocean freeze? Students answer this question by simulating the chemical composition and temperature of arctic waters in their own home.

Study the effects of wind and temperature on evaporation. Place wet sponges in different environments, check at regular intervals, track time required to dry.

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

This science fair project teaches you about what makes persimmons so tart and how astringency can be removed by studying the effect of tannins on fruit.

How does dishwashing liquid work? Kids discover the chemical mechanism behind cleansing power in this easy science fair project idea.

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

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

Investigate how to keep your fruit fresh for longer. The purpose of this science experiment it to determine which kind of bag best preserves fruit.

Learn about where colors come from and how light absorption works in this fun experiment! All you need is a flashlight, construction paper, and cellophane!

This science fair project idea explores edible things you didn't know you could eat.

Test out the pH levels of soil in your backyard versus soil in more wild environments to solve this science case.

Science fair project that identifies the differences between soils from different environments and attempts to figure out why those differences exist.

Ant behavior is closely related to light intensity. This free science fair project idea examines how fast ants dig when they are exposed to to light and dark.

This science fair project idea determines whether the diet and taste preferences of humans relate to their personality.

Science fair project that determines whether tapping a pomegranate with a spoon helps it release its seeds.

This experiment explores whether music affects the growth of bacteria and could help figure out better ways to process sewage and other microbe-assisted duties.

The purpose of this science fair project is to build a basic radio.

The goal of this science fair project is to demonstrate different ways to generate static electricity and record its effects.

While your cells are much too small to see without a microscope, you can create the look of a cell in your very own home with just an egg and vinegar!