At over 14 inches tall, the Fisher-Price Giant Rock-a-Stack takes classic stacking play to new heights. Your baby can grasp and shake the six extra-large, 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 explore! Where development comes into play. Gross 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!