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Construct batteries that make electricity from fruits with this fun science fair project.

Wind is an important source of renewable, green energy. The purpose of this science fair project is to build and operate a windmill generator.

Does putting soapy water on plants help or hinder plant growth? Kids learn about greywater and how it affects plant growth in this cool science fair project.

This project examines whether playing music during class helps students learn or if it distracts students from learning.

What heats up fasterâwater or soil? 5th grade students test the specific heat of water against the specific heat of sand in this great science fair project.

In this science experiment, do tensile strength test on fishing line, a strand of hair, a rubber band, and any other materials you're curious about!

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

Explore the craters, maria, and highlands on the surface of the Moon! In this fun science project you'll create a 3-D model of the moon using paper mache.

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.

In this cool catalase and hydrogen peroxide experiment, kids put a potato in a jar of hydrogen peroxide to see how catalase acts as an enzyme.

Kids get step-by-step instructions for how to make a rubber band car and explore the physics of potential energy with this fun engineering science fair project.

What is the hydrologic cycle and how does it work? Check out this fun and easy science project where you will model and learn about Earth's water cycle!

This science fair project idea examines the reason boats are shaped and engineered.

Kids will create their own version of Richard Feynman's rubber band heat engine to learn about thermodynamics with this cool science fair project idea.

This science fair project idea develops an understanding through experimentation of which shapes are the most structurally strong.

Science fair project about work and energy which uses a simple mathematical formula to predict how far a jar will roll down an incline.

In this science fair project, learn how to make gears and find out why they transmit torques in predictable ways.

The objective this science fair project is to determine whether a bigger bag will allow a homemade hot air balloon to fly higher than smaller bag.