The fish fishing for a man is obviously what inspired the poem, but you can also see that fish are flying in the air and birds swimming underwater, and a lamb is attacking a lion or wolf. I'm not sure what the balls under the tree are - apples growing from the ground, perhaps? “The World Turned Upside Down” was the name of a British ballad from the mid-seventeenth century, which had nothing to do with fish or birds or any of the rest of it, so the original block print doesn’t illustrate that. It leaves me very curious as to what the original block print illustrated. Anyway, I think it’s funny.
[Picture: The World Turned Upside Down, wood block print from Rhymes for Children, 1919 (Image from Internet Archive).]