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

Calculate the mass of the Earth using the sidereal and calendar period of the Moon and Newton's Law of Universal Gravitation in this physics science project!

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

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

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

Investigate the different ways in which objects and organisms can be classified, create your own. then have volunteers classify using their own systems.

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.

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

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

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

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.

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.

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.

Science fair project that guides you through how to test the humidity in the environment using a homemade psychrometer.

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

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

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

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

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

Science fair project in which you will attempt to throw a ball the greatest horizontal distance possible by using different angles.

Design and build a scale model representing living tree architecture. Then build a full-size version using one or more lives trees, and test your creation.

Demonstrate how you can make your own compass using a magnetized needle. It also allows you to compare magnetic north and geographic north.

In this awesome science fair project idea, kids will be attempting to pick up different objects using snail slime.

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

Gymnosperms are coniferous trees that reproduces using pine cones to spread seeds. Check out this simple pine cone experiment to learn about the process!

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.