Stackable, colorful cylinder steps encourage fine motor and identification skills while Exploring seriation and color gradients. Five rows of appealing, rubber wood cylinders in increasing size and transitioning colors are easy-to-grasp and compelling to stack and sort. The durable puzzle board is sanded smooth and reinforced with soft plastic handles. Children develop organization and color variation skills, as well as hand-eye coordination. For ages: 2+. dimensions: 13 x 11. 75 x 3 in (33 x 29. 8 x 7. 6 cm)., Practice organization and identification with cylinder steps, Multi-color shapes encourage color recognition, Strengthen fine-motor, differentiation and color-recognition skills.