It's a great BIG block of fascinating discoveries, with music, motion, lights, and five sides of busy play! 1 Spin & Learn: The Incrediblock top is where the action is-and the learning! Place any of the eight special Peek-a-Blocks™ in the center to bring it to life. Hear words, sounds and songs to discover what's inside each block! Lots of other activities for baby to bat, flip, tap and spin, too. 2 Plug & Play: Bright, bold patterns, charming images and a shiny mirror are sure to stimulate baby's senses! 3 Sort & Store: The simple action of placing 8 blocks through the holes and watching them disappear is sure to entertain and enlighten your curious baby! Big drawer can hold up to 30 Peek-a-Blocks. 4 Drop & Tumble: With distinctive sounds and fun movement, each block offers new surprises while tumbling down. Baby will love dropping them in over and over, anticipating that something fun is going to happen! 5 Stack & Spill: Baby will love learning to stack blocks in, one after another. Watch fine motor skills steadily improve, along with eye-hand coordination, as blocks are grasped and stacked.