Boost your preschooler's attention to detail by getting her to explore the differences between two different pumpkins: large and small.

Your preschooler will engage their senses by making a scented pumpkin to decorate your house.

This two-ingredient dough, sometimes called "moon sand," is a quick and cheap way to let kids explore their senses, build fine motor skills, and play.

Determines the extent that high school GPA predicts future income. Survey volunteers, divide GPA into 5 categories, compare income levels with GPA

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.

Determine the effect of homework on academic performance. Collect grade info at the end of a semester, determine correlation between grades, amount of homework

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.

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

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

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

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

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

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

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

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

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

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

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

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.

Your preschooler can learn how to siphon water with just two bottles and a plastic tube in this fun, educational science activity.

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