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Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

Science fair project that identifies the differences between soils from different environments and attempts to figure out why those differences exist.

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

In this science fair project, students create their own miniature salt flats at home.

This science fair project examines how seeds hitchhike on animals and clothing.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

In this science fair project, apply the principles of leverage and force by building six simple machines designed to set weights in motion.

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

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

The objective of this science fair project is to examine the basic principles of air pressure using simple materials like a balloon, straw and string.

This science fair project idea explores plant growth from a bulb, root, and a stem and investigates asexual plant reproduction.

This science fair project idea investigates the difference in reaction times between boys and girls.

This science fair project idea investigates the ability of different whitening toothpastes to whiten teeth.

This science fair project idea investigates if fats add to the flavor of food.

This science fair project investigates whether tapping the top or the side of the can will stop a vigorously-shaken can of soda from exploding.

This science fair project teaches students about wilting and browning of salad greens.

Collect meteorite dust with a magnet in your very own backyard! The objective of this science fair project is to gather meteorite dust to study outer space.

This science fair project on testing water hardness is a great introduction to practical chemistry. Test and learn the difference between hard and soft water.

This science fair project idea investigates how a bottom keel helps keep a boat from rocking back and forth.

This science fair project idea explores how the shape of a boat affects its density and how much weight it can float.

This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.

Construct and experiment with a periscope using reflected light rays to gather an image.

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

In this science fair project, learn how a mineral streak is made and how it can help identify an unknown mineral.

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

This science fair project idea examines whether the colors of the spectrum respond differently in the thermal aspect when radiated by the sun.