The great thing about being big (as every older sibling knows and flaunts) is that you get to stay up later than your younger brothers and sisters. On the other hand, staying up late isn't always all it's cracked up to be. Adorable little elephant Humphrey, whom we met in Humphrey's Corner, looks on in bemusement as his big sister Lottie gloats over her privileges: "I don't go to bed yet. I am a BIG GIRL." Humphrey has a lovely time in his bath, enjoys a hot milk and buttery toast supper, and gets all snuggly and sleepy as his mother reads him his favorite fairy tale. Meanwhile, Lottie, who has declined all bedtime rituals, is becoming hot and cranky. Sally Hunter's pastel-colored pencil and watercolor illustrations are filled with details of a cozy home life, while her simple, toddler-like text depicts the sometimes complicated desires of children. Bed-shy kids will see bedtime in an entirely new light, whether they identify with Lottie or Humphrey. (Ages 3 to 6) --Emilie Coulter