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.

Use reusable, recyclable materials--along with a dose of imagination--to build a castle with first grade geometrical forms.

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

Is exercise a cellular activity? Check out this fun science fair project idea to compare the carbon dioxide production before and after exercise.

In this simple and social activity, children use size comparison skills to find objects in nature that are bigger, smaller, longer, and shorter.

In this cool science experiment, test and compare the adhesive holding strength of homemade casein glue versus commercial glue.

Put a twist on traditional oil painting with this fun science activity that you and your first grader can do together.

The objective of this science fair project is to test the growth rate of a plan in a crystal medium in comparison to traditional soil.

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.

Wool can absorb 1/3 of its weight in water, while still keeping the body warm. She can test this theory by performing a scientific sock comparison!

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

Show your fifth grade scientist how to create a siphon using two buckets, plastic tubing, and water. Watch her astonishment as the water travels uphill!

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

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.

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

Children learn the six parts of a plant...but do they really understand? Try this plant-themed meal plan to bring school science into the home.

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.

Is it solid or liquid? Create oobleck and witness the amazingly weird oscillation between the two!

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.

Teach your little scientist about the amazing powers of gravity by comparing the falling speeds of two yummy fruits

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.