Grasp, squeeze, shake, and stack two soft, fabric-covered rings (one of which crinkles), a durable plastic textured ring, and a soft textured topper with crinkle leaves and silky smooth ribbons. All fit on a rattling, rocking base and post to make a friendly, happy-faced pineapple! The stacker is an engaging way to help infants six months and older develop important sensory, fine motor, and problem-solving skills.