This activity will introduce your child to the four different components of blood and give him a fun way to visualize its properties.

Using plants and other items from the outdoors and clothing they already own, your kids can dress up as any one of the four seasons or simply as a Garden.

This crafty activity provides a hands-on way for your child to illustrate how the trees look during each season of the year.

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

In this science fair project, students will use four different household objects to see which ones form the most or best crystals.

Compare the whitening abilities of four different brands of whitening toothpaste to see which one whitens the fastest and which one whitens the most.

In this science fair project, young children will become aware of and have the opportunity to experience the four basic tastes: sweet, sour, salty, and bitter.

Show your kids the power of baking powder by conducting a simple experiment. Make four batches of cornbread, all identical except for one thing: baking powder!

Here's a fun math and science activity: help your child explore four different kinds of measurement, using their hand and a few simple household tools.

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 science fair project, students investigate the applicability of Benford's Law to many sets of everyday data.

This project examines the amount of saltwater required to affect the growth of plants and subsequent effects on growth and development.

This project explores the effectiveness of various common household ingredients in cleaning tarnished and oxidized coins.

Science fair project which uses coins flips to visually demonstrate the probability of an event and how to express it.

Combine science with reading and art to help your first grader create an attractive holiday gift for a beloved friend or relative.

This science fair project idea explores substances that cause a bubble to last longer.

Determine how we can separate the components of a solution

This project explores whether plants can live and grow when "watered" with juice, soda, or milk.

What happens when light hits a hard surface? Find out by conducting a simple light reflection experiment with your preschooler.

This science fair project determines the quality of a given product.

Check out this fun science project idea to get a better understanding of unstable isotopes and the process of radioactive decay of isotopes through modeling.

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

This science fair idea examines hydrogel superabsorbent polymer crystals. They can absorb 500 times their weight in water. Can they absorb other liquids too?

The project investigates which soft drink is worse for your teeth by observing the affect of soft drink on limestone.

Discover which method for odor removal words the best for stifling refrigerator odors.

When you see those sunscreen "protection levels," what does that really mean? Try this experiment to find out.

Science fair project that examines how yeast grows, and which conditions allow for optimal growth. What types of nutrients does yeast prefer?

Science fair project that determines which materials cause the most friction by sliding blocks of wood down a ramp.