Lois Ehlert (1934–2021) illustrated numerous inventive, celebrated, and bestselling picture books, including Chicka Chicka Boom BoomMiceTen Little Caterpillars, and her own Holey Moley, The Scraps Book, RRRalphLots of SpotsBoo to You!Leaf ManSnowballs, Waiting for WingsPlanting a RainbowGrowing Vegetable Soup, and Color Zoo, which received a Caldecott Honor.