I love Mo Willems! We recently discovered his works and read them to our 3 kids (1, 3 and 5 yrs). But you missed Knuffle Bunny! They are my favorite Willems works. Knuffle Bunny is a trilogy and reminds me of Toy Story in many ways, especially in the amount of humor present for all age brackets. We also enjoy Goldilocks and the Three Dinosaurs.