As a boy in a bed says, "roll over" an animal rolls out to our right, but we only see what it is when we lift the flap. The story starts with 10 in the bed, ends with 1 as the boy says, "good night" but then we see the animals to the left as they all say "good night." May be based on a song, but there is no mention of it. The animals are fantastic, but not related to each other. Cute and flaps are always nice, but I'd prefer a more cohesive group of creatures. ( )