Check out this fun science fair project idea to explore the process of diffusion in a cell and learn the difference between osmosis and diffusion.

This project investigates the affect of storage temperature on microwave popcorn.

Find out whether putting something on top of a plant will inhibit its growth.

This project examines how temperature affects the volume of gas in balloons.

What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.

Explore the best way to store popcorn kernels. It examines the impact of moisture and temperature on unpopped kernels.

Science fair project that determines whether spreading a moss soup over an area increases moss growth.

Check out this cool science fair project idea that models the behavior of the cold desert plants: xerophytes and halophytes.

Kids will love making clouds and learning how to make a water cycle model in this fun science fair project idea that explores evaporation and precipitation.

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.

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.

The objective of this project is to evaluate whether a top will spin at different rates during different phases of the moon.

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.