Two sisters describe the seasonal changes in their apple tree as it grows leaves, then small pink flowers, then tiny green apples. Soon, big, round, red apples are ready to be picked and baked in a pie. Meanwhile, robins have make a nest, laid eggs, and raised their babies. The book also includes an explanation of pollination and a recipe for apple pie. Textured paper makes the collage illustrations of the tree and its inhabitants even more realistic.