A playful board book from four-time Caldecott Honor-winner Leo Lionni book for the very youngest readers! "What shall we do today?" two mice ask each other. "Read a book? Pick flowers? Go swimming? Play ball? Climb a tree or gather leaves? Play hide-and-seek or dress-up? Talk on the telephone-until it's time to say good night?" Lionni's award-winning graphic art is at its best in this very simple board book that begs to be shared with a baby or toddler.