Funniest book ever. The pairing of the quirkiness of the story of Lore Segal and the awesome hilarity of Rosemary Wells illustrations is a killer combo. There are three stories in the book, all told about a girl named Gertrude but who goes by Trudy and a mother and a father and a baby brother Jacob.
They have adventures with Superman and aliens in their bathroom, and with Aunt Shirley and Cousin Leonard and sharing, and with their copycatting Grandmother. All of whom are extremely funny characters. The three stories (or Trudys) are all wonderful, but I think the Superman one is my favorite.
The essence of children is truly captured in the full spectrum: annoying, intelligent, gullible, fair, innocent and hilarious. Both in Lore Segal's dialog, and in Rosmary Well's evocative illustrations. I grew up with this book, and it weaved itself in and around our inside jokes and random references to become the stuff of familial legend. Buy it for yourself or your kids for Christmas, or check it out from the library. You won't regret it.