Feel to Learn: Stack & Roll RingsThe little ones will have great fun by threading and stacking the rings with different textures; it can then be used as a roller when both caps are added to keep on rolling endlessly. It contains four stackable rings to promote spatial vision, reasoning, logic and motor skills when they are inserted onto the cone in the right order. All the pieces are made of eco friendly materials that are resistant and durable. Recommended age 6 12 months