18 months & up. This plastic egg carton features a dozen colorful eggs that pull apart to reveal brightly colored numbers to match with their corresponding pegs and holes These easy to grasp eggs are ideal for children to learn counting, sorting, number recognition, and color matching. This set promotes dexterity and fine motor skills all while children explore and play with the eggs. When children are finished playing, they can simply stack the eggs back into the durable carton for convenient storage. Carton measures 11.7". Eggs measure 1.8" in diameter.