3 years & up. Set of 14 laser cut double-sided mirror numbers from 0 to 9, including two styles of the numbers 4 and 7 and an additional 1 and 0. Made from highly reflective acrylic. A sensory manipulative for children to experience as they feel, see, play with and trace around. Perfect for light play and sand and water experiences. All pieces come with a small hole at the top so they can be strung up to create mobile displays.