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.