This science fair project idea builds models of various types of bridges and then determines which bridge design is the strongest.

Science fair project which simulates the global conveyor belts on a small scale, and observes the effects of wind, density and temperature on water movement.

This science fair project idea produces consumable fresh water from salt water through desalination.

This project determines whether Styrofoam, paper, or plastic cups are best for preventing ice from melting.

Examine how a battery can be made from everyday materials.

In this experiment you simulate radioactive decay in order to gain an understanding of the basics of half-life.

Research active ingredients in anti-aging creams. Test skin creams on volunteers, document the effectiveness of the creams with before an after photographs.

Compare the amount of ozone in various locations with this science fair project that will have your kid create her own ozone strips!

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.

Can cells be frozen? This science fair project provides information to answer this question.

Science fair project idea which teaches you how to make butter by separating cream into butter and buttermilk.

Science fair project that examines various techniques for removing wrinkles from polyester garments to understand why polyester garments become wrinkled.

Science fair project which determines whether people are more likely to follow rules if they are easy to understand.

Use chemical analysis to identify a variety of mystery powders that look the same but actually have very different properties.

What is biodiversity? Kids will study different areas of their backyards to see which is the most diverse to learn about biodiversity and random sampling.

Science fair project that compares the ecology of different soil samples by identifying which sample has the most invertebrates living in it.

Compare the ignition rates of various types of flame-retardant materials.

Which bread molds fastest? Explore the different kinds of breads and how quickly they mold, along with the role of preservatives.

Science fair project that explore how compound motion works by examining how gravity is affected by horizontal force.

In this science fair project, young children will become aware of and have the opportunity to experience the four basic tastes: sweet, sour, salty, and bitter.

In this cool elementary school science fair project idea make a model to learn what happens to the Earth's surface when ice moves over land.

Science fair project that examines condensation and the conditions needed in order for dew to form.

This experiment will determine how different kinds of light affects the strength of bakerâs yeast.

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

This science fair project looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

Do you think heat can affect a plant's growth rate?

In this fun science experiment, kids will determine the best method for ripening avocados and discover the cool chemical reaction that makes this possible.

In this science fair project, we learn how air molecules move as a result of density, convection, and air currents.

In this project, learn about animal vision and different kinds of eyes: ocelli, compound eyes, and camera eyes. Find out what a jellyfish or grasshopper sees!

This project is a vivid, concrete introduction to the basic but important idea that plants need sunlight and water to grow.