Sharing/Cooperation. A patron just shared this with me. I like Betsy Lewin but didnt' know this one. Chubbo, a hippo, finds a pool of water but refuses to share. When the pool dries up in the African sun, hippo has nowhere to go. finally the elephants are nice enough to fill his pool with their trunks. Great story on the importance of sharing presented in a fun way with wonderful illustrations.