Wonderfall follows a single tree through the changing of the seasons. People, animals, and vehicles pass in front of the tree, celebrating holidays, playing in its leaves, and getting ready for winter. Fifteen combined words (thankful + fall = thankFALL, plentiful + fall = plentiFALL) underscore the themes and concepts of the season, while the main attraction--the beautiful tree--drops acorns, loses leaves, and provides food and a home for a pair of scurrying squirrels. Two full spreads at the back of the book offer additional information about the animals featured in the book, as well as the science behind squirrels, acorns, and saplings.