Wonderfall follows a single tree through the changing of the seasons, from late summer to winter’s first snowfall. People, animals, and vehicles pass in front of the tree, celebrating holidays, playing in the leaves, and getting ready for winter. Fifteen made-up words (thankFALL, 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 and about the seasonal transformation of the tree.