Children in Montessori Elementary classrooms will love doing short and long multiplication of whole numbers (up to 100,000,000) on this handsome, quilted mat. Unlike hard surface checkerboards, the beads won’t roll around, a definite advantage! There are 36 squares in the hierarchical colors of green, blue, and red on a black background. Handmade, each mat is charming and unique. Rolls up and ties with a red grosgrain ribbon. 28½" x 15½". Ages 6 to 9.