Chalk Is Used As Part Of School Supplies For Young Children. Chalk available in reusable plastic tub for convenient storage. Tub holds large pieces (4" tall x 1" diameter) of sidewalk chalk in assorted colors. Large pieces are easy for small hands to grasp. Chalk is nontoxic and washable. Storage tub has a sturdy lid and strong handle. Creativity Street Sidewalk Chalk available in package quantities of 20 or 52 per box.