Merry Go School Bus I had a very similar toy to this but it was push / friction powered and the bus would travel around a track and you could stop it at various points, i.e. a bridge that you raised using a lever, traffic lights that you twisted around from red to green and a ferry that would carry the bus across the river (wavy blue plastic tray basically).
Loved it but cannot for the life of me remember what it was called as I'd love to try and get hold of one to show my kids - any help appreciated