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This science fair project idea compares the mass and density of objects.

This science fair project idea measures the growth of bread dough and finds out how long it takes for the dough to stop rising.

Check out this cool and free middle school science fair project idea on how to make a solar oven.

What is the coldest temperature possible? In this cool experiment, you'll calculate absolute zero by extrapolating data on the temperature and volume of gas.

Science fair project that examines oxidation, reduction and chemical indicators by testing for the presence of the iodide in salt.

Can you imagine a sky filled with bright, colorful bubbles? Make this whimsical scene come alive with bubble science!

Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.

In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

Certain fruits can change gelatinâs ability to set. In this experiment, kids will discover what happens when gelatin meets pineapple enzyme.

In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.

This science fair project idea examines which type of insulation holds in the most heat.

This project explores ways to prevent static electrical shocks.

This middle school science fair project determines whether DNA is most easily extracted from under-ripe, ripe, or over-ripe strawberries.

Check out this fun science fair project idea for middle school students to learn about the effects of temperature on the density of a gas such as air.

In this science fair project caffeine will be extracted from Gunpowder Green Tea, illustrating the isolation of a naturally occurring product from a plant.

In this cool project, create a lighted, scale model of the different layers of the Sun, including the core, radiation and convection zones, and photosphere.

In this experiment, young ecologists will learn about a type of edge effect: how trees and plants at the edge of a forest can act as a weed filter.

In this fun project, use a memory game to test various age groups and determine whether aging directly affects short-term memory loss.

Is horse manure a possible energy source in a crisis? Use calorimetry to find out how much energy horse manure can produce in this science fair project.

Construct calorimeter and determine the caloric value of a sample of foods by change in temperature for each of the foods.

This science fair project idea explores whether boiling and freezing water will have an effect on how much it weighs.

Discover if soda geysers will erupt when using regular vs. diet cola and which candies will create eruptions.

Learn the basic structure of a DNA strand, which is the double helix, how genes form together, and the resemblance DNA has to a twisted ladder. Create a model.

Science fair project that demonstrates the process known as refraction, which allows glasses and contact lenses to help people with poor vision.

Learn about the greenhouse effect- and get great science fair experiment ideas. Read more.

In this science fair project, kids start a chemical reaction that will make a balloon inflate itself!

In this science fair project, students test how objects float and sink in liquids of different densities.

Check out this cool science fair project idea to learn why it is important for kids to eat healthy foods like fresh fruits and vegetables.

This experiment demonstrates the conservation and transfer of energy using a marble rolling over sandpaper.

This science fair project investigates what type of cookie sheet bakes the best cookies.