These sturdy plastic numbers are great fun for children and early learning sand play. Each mold is in the shape of numbers and operations that come in different colors of red, blue, green, purple and yellow. The texture of sand helps to reinforce and make practicing numbers enjoyable for children. It includes two sets of zero to nine and each mold measures 3"H. Create an interactive play experience for children while they learn number recognition and improve eye-hand coordination, motor skills and build self-confidence. These are perfect to use in sand and water tables. The molds come with a mesh storage bag that makes it easy to take along on travel.