At over 14 inches tall, the FisherPrice Giant Rock aStack takes classic stacking play to new heights. Your baby can grasp and shake the six extralarge, colorful rings, then stack 'em up high on the wibbly wobbly, super sized base. And the littlest ring has swirling beads inside for your tot to shake and exploreWhere development comes into playGross Motor: Standing up to drop the rings on the base helps strengthen your baby's balance and coordination skills.Fine Motor: Grasping and stacking the rings helps strengthen dexterity and hand eye coordination.Thinking Skills: Figuring out how to sort and stack the rings from biggest to smallest helps promote problem solving