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How can we describe the relationship of magnetic field strength vs. distance? Kids will find out with this free science fair project idea.

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

How does a flashlight work? Kids will make a complete circuit and explore how voltage contributes to brightness with this science fair project idea.

This classic children's game demonstrates how sound travels through air vs. through a solid.

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

Learn whether Mylar Balloons last longer than Latex Balloons or vice versa.

What keeps a an item cooler, polymer crystals or ice? Find out in this cool science experiment!

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

What's the difference between a microwave and an oven? Use mashed potatoes to explore which kitchen appliance does a better job at keeping food warm.

The goal of this science fair project is to analyze differences between the taste and texture of frozen and fresh food.

This science fair project idea highlights decomposition rates by comparing how long it takes an item to decompose in a compost pile vs. a landfill.

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.

This science fair project idea examines whether boys and girls differ in reflexes.

This experiment explores whether reading text on a computer screen or type on paper leads to better retention of the information read.

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

In this project, you'll build a model of the earth, complete with all seven continents and four major oceans.

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.

In this experiment, your child will create two compost bins and see if he can determine what attracts fruit flies.

Milk is made of water and fat; but how can you separate the two? Find out in this color changing milk experiment.

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

Have you ever seen fruit decay? Find out if a fruit will rot faster if you open it versus leaving it untouched!

Kids will make predictions about cricket behavior by conducting this fun and easy experiment which simulates different environments for crickets.

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

This science fair project idea explores the different properties & interactions of sugar molecules.

Science fair project that examines albedo, and how this information is applied in the design of cars, sportswear, and other items. Which colors reflect light?

This science project explores the concept of being opaque or clear. Can you make something clear opaque? Or something opaque clear?

The objective of this science fair project is to analyze the effects of salinity and temperature on water.