The wheels on the bus go 'round and 'round, the shapes go in and out, the window goes back and forth, the hood opens and closes, and the fun goes on and on! Six blocks with special shapes are great for learning to sort, with extra-special objects inside to give baby a "peek" at school-time discoveries. Music, lights and sounds add extra delight, with eight fun tunes to hear. Easily converts from sit-and-play activities to pull-along fun!