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

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.

In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

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

In this project, you will observe and record changes in sunspots over two weeks.

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

In this science fair project, young children discover what happens when two fluids that have different densities get together.

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

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

Science fair project the demonstrates Newton's Third Law using a milk carton filled with water.

Did you ever drink spoiled milk? Find out whether whole milk spoils at the same rate as 2% and skim milk.

This science fair project idea determines an average personâs ability to use their anaerobic power system over a period of 2 weeks.

Determine whether a hot liquid cools off faster when liquid is added before or after a two minute wait.

This experiment will determine how different kinds of light affects the strength of bakerâs yeast.

In this science fair project, high school students will try to determine the mathematical patterns in JS Bach's two movement preludes and fugues.

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

Determine whether cats have dominant paws. Observe which paw cat uses to reach for treats, feather, and string. Calculate percentage for two paws.

This science fair project idea focuses on two classes of sugars monosaccharides (fructose) and disaccharides (sucrose or table sugar).

This science fair project compares the allelopathic affects of juglone, a chemical agent produced by the Black Walnut tree, on two plants.

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

Administer IQ tests to volunteers. have one group practice typical IQ test problems. Then compare results of the two groups.

This science fair project determines which of two chemical agents can be used to release the drug (tea) from hydrogel crystals.

This project examines Newton's First and Second Laws of Motion with a bicycle and water balloons.

Monitor the impact learning how to play chess has an academic performance. Divide subjects into two groups compare GPA

This science fair project investigates which of two learning modes most commonly used in school, visual and auditory, is better for information retention.

Young scientists will investigate people's preferences for saltiness, and make some inferences about genetics and diet.

This science fair project studies which color(s) of flowers butterflies & bees are attracted to and if color plays a role in flower selection for pollination.

This science fair project idea teaches about the size of two different systems: the solar system and an atomic system.

In this experiment two environments will be compared: a room with interior design that uses correct Feng Shui versus one with incorrect Feng Shui.

The objective of this science fair project is to explore whether superabsorbent polymer or hyrdrogel crystals have the best waterabsorbency.