Expand your brick building with our Preschool Building Bases. Our building bases provide a sturdy foundation for children to create and build masterpieces. The standard sized brick bases measure 20” x 10” and is compatible with most preschool sized building bricks. Using building bricks help teach STEM concepts of spatial thinking and imaginative 3D building while strengthening fine motor skills. They promote perceptual and fine motor development while encouraging cooperative group play. The Preschool Building Bases are green in color and come in a set of 4. The large size of the bases allows enough space to accommodate multiple children in cooperative building activities. Our Preschool Building Bases fit our Preschool Building Bricks (ATC-05 sold separately). It is an ideal addition to classrooms, preschools, and the home environment. It can be cleaned with a mild soap and water mixture and a soft, damp cloth. For children ages 2 years +.