10 months & up. Young children will enjoy multiple ways to play with the Plugzy Shape Sorter. Each shape is made up of a 3D shape on the board, a hollow piece, and a silicone plug. Children can start by fitting the hollow shape onto the 3D shape, then they can add the silicone plug to the top of the hollow shape. The hollow shape and silicone plug can also be used together as one piece. Each silicone plug has a unique texture for added sensory exploration. Includes base, 6 hollow pieces, and 6 silicone plugs. Plugs are made of 100% food-grade silicone. BPA free. Measures 9" x 9" x 3.5".