3 months & up. Fascination will keep babies eyes on the objects and feel the action in their hands. Exposes babies to different types of sounds. Each lightweight tube is extremely sturdy and permanently sealed for safety. From bells, beads, feathers, sparkly gems, and more, all 6 tubes have color, sounds, and movement as the objects roll inside. Develops eye-hand tracking skills and sensory perception experiences. Each tube is 16" long.