Room on the Broom

The witch's repeated losses create the structure: each animal retrieves an item and asks to join the broom. That growing passenger list is not decorative; when the broom breaks and a dragon threatens the witch, the same animals combine their features into a single invented creature and drive it away.

The practical comparison with The Gruffalo is how cooperation works. Gruffalo's mouse survives alone by manipulating a repeated sequence; Room's witch is rescued because earlier acts of inclusion created a group capable of acting together. Choose this for reciprocity and cumulative assembly, while noting that the dragon's threat to eat the witch is explicit.