Siblings Annie and Simon are back in another terrific book for advanced beginning readers. Three humorous stories showcase their relationship. In the first, teenage Simon gets unsolicited help making banana muffins from preschool-age Annie, who is determined that chocolate chips will be included whether or not they’re part of the recipe. In the second Annie helps Simon take care of baby Theo from next door (“'Simon, jump around and do your silly dance. That will make Theo stop crying.’ 'Oh, for heaven’s sake,’ said Simon, but he went ahead and did his silly dance.”) In the third, Annie rediscovers her “bobo,” her pacifier, and insists on using it, to Simon’s annoyance, but it comes in surprisingly handy when they go in search of butterflies and find a porcupine instead. Spot watercolor illustrations add to the charm of this volume. (Ages 3-7)