This set includes 15 plastic stamps with rubber imprints of numbers 0-9, addition, subtraction, multiplication, division and equal sign. Number and Sign Stamps are hands-on, visual tools to demonstrate and teach a variety of math concepts: addition, subtraction, division and multiplication. Children can also use these stamps to customize cards, posters, notebooks and more! Stamping activities develop children’s fine motor skills, hand-eye coordination and creative expression. Each stamp has a curved handle for easy fingertip grip. Number and Sign Stamps come packaged in a labelled, sectioned case for easy clean-up and storage. For ages 3+. Size of stamps: 1"L x 1"W x 1"H.