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

This science fair project idea produces sounds by creating vibrations using different objects.

Evaluate whether people can raise the temperature of their finger using the power of their thoughts.

Science fair project the demonstrates Newton's Third Law using a milk carton filled with water.

Science fair project that examines how to grow bacteria in a controlled setting, using simple materials from around the home.

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.

In this physics project, you'll learn how to find the maximum height of a projectile using some math and trigonometry.

Experiment about connection of senses of taste and smell. Using blindfold and noseplugs, administer blind taste test. Analyze results and organize data.

Science fair project that creates fog using bottles of hot and cold water.

This project involves the programming and development of a 3D Rubik's Cube application using C++.

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

Science fair project which examines how stopping a tomato's ripening process using the enzyme ethylene effects the tomato plant and its reproduction cycle.

In this science fair project you will make a model of a cell membrane using very simple material.

Free science fair project idea that measures change in flexibility with age, using a variety of flexibility tests like Sit & Reach.

This project involves the development of a website using free software online to promote the value of science.

Science fair project that examines search engine optimization, internet search trends using a statistical study of searched keywords.

What kind of fabric holds dye best? How can you improve a dyed fabric's colorfastness? In this colorful project, test colorfastness using mordants and bleach.

Explore the properties of light and color using photographic filters. Take pictures of color spectrum, compare results of different filters.

Science fair project in which you will start a fire from scratch without using matches or a lighter.

This science fair project idea explores whether a sundial is as accurate as an atomic clock when telling time.

Construct a model of radioactive decay. Learn more about radioactive decay by modeling the process using coin flips.

This science fair project idea determines whether dogs can be trained faster using a food reward or praise.

How does frost form? How fast does it form? Do this simple science project using a plastic glass, rock salt and some water to learn about deposition.

Science fair project that demonstrates how a rainbow forms, by using water to split white light into its many colors.

This science fair project idea determines what factors influence an individual's reaction time using a web-based timed reaction test.

Check out this cool science fair project idea to explore non-chemical means of preserving fruits by using thermotherapy.

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

This cool science fair project teaches kids about temperature, density and buoyancy using balloons that float with normal air. No helium required!

In this cool experiment, learn how to find specific gravity of minerals using liquids of different densities to see which substances and items sink and float.

Demonstrate the properties of pressure and surface tension to explain how water can stay inside an upside down glass using cardboard.