Piaget tried this first, and he articulated the puzzle: If the baby wants the keys so much, why doesn't he just pull off the washcloth and find them? Maybe it's cecause he just isn't well coordinated enough. But you can test that by covering the keys with a transparent cover. The baby has no trouble whisking off the cover then. Maybe the baby doesn't remember that the keys are three. But you can show that babies this age remember other events for days or weeks Instead, it seems the baby genuiely doesn't think that the kets are still there under the washcloth. For him the keys' reappearance from under the washcloth is like the magician's rabbit in the hat for us, a mystifying act of legerdemain.