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https://en.wikipedia.org/wiki/A_Little_Fable is probably a close as Kafka got to a children's book.

"Alas", said the mouse, "the whole world is growing smaller every day. At the beginning it was so big that I was afraid, I kept running and running, and I was glad when I saw walls far away to the right and left, but these long walls have narrowed so quickly that I am in the last chamber already, and there in the corner stands the trap that I am running into."

"You only need to change your direction," said the cat, and ate it up.