Using a toy race car kids create a visual model of the Doppler Effect.

Have fun with bubbles and find out why there are bubbles in your tap water in this cool science fair project idea.

This science fair project idea quantifies growth of seedlings at various pH levels.

The objective of this science project was to build a model of a volcano and observe reaction between different substances, including baking soda and vinegar.

Science fair project that tests the effects of temperature change on the reactivity of the catalase enzyme.

This science fair project idea determines which flower lasts the longest.

This science fair project idea discovers whether there are some objects that do not fall at a constant rate.

Science fair project idea that compares number and relative sizes of leaf stomata. Collect leaves of plant species, identify, observe stomata with microscope.

Science fair project idea examines different techniques for memorization. Analyze results of memory tests to determine which method is most effective.

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.

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

This is a fantastic and easy science experiment where kids will learn about elasticity by testing how high bouncy balls of different materials can bounce.

Science fair project which measures whether tsunamis are more destructive when they are caused by an earthquake or by a meteor.

Science fair project that determines which materials cause the most friction by sliding blocks of wood down a ramp.

High school students recreate Michael Faraday's experiment in this cool science fair project that induces current in a coil of wire.

This weather spinner will improve observation skills by encouraging children to examine and track weather details and patterns.

What keeps a an item cooler, polymer crystals or ice? Find out in this cool science experiment!

Science fair project that tests how well various sunscreens protect skin from the sunâs ultraviolet radiation by measuring their effect on sun-sensitive paper.

This project explores how and how much one family can reduce the amount of garbage they accumulate over a three month period.

Free science fair project idea examining how different types of water affect plant germination and growth.

Kids love the dramatic Mentos and Diet Coke experiment conducted in this awesome science fair project.

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

The purpose of this science project is to investigate which will grow larger plants: compost, soil and Miracle - Gro, a mixture of both.

This project examines the affect of temperature on viscosity and surface tension of different liquids.

Science fair project which compares the rate of temperature change and the maximum temperature as a result of the angle of light radiation.

Determine how wind speed affects the stability of a kite and the ease of getting it into the air.

This science fair project idea determines the most effective method of preserving food.

This science fair project idea will be examining oxidation and acid rain

This free science fair project explores the "dirty" relationship between the presence of organic material in soil and water absorbency.

Create a double-slit interference out of cardboard. Produce an interference pattern that demonstrates the wave and particle characteristics of light.