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This science project teaches students about organic farming and the benefits and disadvantages of commercial plant food.

This science fair project idea explores whether a plastic slinky works as well as a metal slinky when walking it down the stairs.

Explore how sound waves are reflected and absorbed by producing echoes. Analyze which locations produce echoes.

What are the effects of colored light on plant growth? Explore plant behavior in this cool botany science fair project and learn about phototropism!

This experiment challenges students to forecast the weather based on the surrounding areas' weather.

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

This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

This science fair project idea discovers if an artificial light source will yield the same plant health and growth rates as light from the sun.

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

This science fair project investigates why the number of visible stars changes from place to place.

Science fair project that uses muriatic acid to develop fingerprints that would otherwise be invisible.

This tactile activity helps kindergarteners learn about texture.

This surprisingly good glue recipe comes from common kitchen items.

This project makes young children uniquely aware of their sense of touch and its ability to alone give them information about the world around them.

This science fair project idea demonstrates that light travels in straight lines and experiments with reflecting light.

This project compares the strength of one, two, and three-ply toilet paper.

Discover that the absorbency of fabrics depend largely on the shape and structure of the individual fibers that make up the fabric.

Discover whether different amounts of water added into a wine glass will produce a different pitch when their fingers are rubbed along the rim.

Learn how to make a hygrometer to measure relative humidity in this project. Make a sling psychrometer hygrometer with gauze, thermometers, and a bottle.

With a clear bottle and a few plastic straws, you can easily make a hummingbird feeder and demonstrate the effects of atmospheric pressure at the same time!

Here is a hands-on activity to help third graders understand the four points of a compass...and how we use them to get around.

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.

The objective of this science fair project is to set up a compost bin to convert food scraps and organic waste.

In this cool science experiment, learn about magnetism and poles, and test magnet strength to find out if two magnets are twice as strong as one.

Brine shrimp usually live in saltwater. Investigate how salt concentration (salinity) affects the rate at which brine shrimp eggs hatch.

How do organic materials become soil? This science experiment measures what materials biodegrade.

This science research project challenges students to think of more effective lobster farming methods.

How does salinity affect the point at which water freezes? Kids will find out by performing this cool melting ice experiment.