Once upon a time, a bear swallowed a fly in his sleep. Why does she have to buzz so much in his stomach? It's unbearable! Following the squirrel's advice, the bear swallows a frog so that it eats the fly. Unfortunately the frog starts to croak annoyingly. What eats frogs, then? And then what eats snakes, herons, foxes... What does it take to end this torture?
