Sixty years of "Hop on Pop"

Hop on Pop by Dr. Seuss turns sixty this year, and boy has it aged well.

Fatherly's Matthew Kaplowitz took a look back at what was ground-breaking — and what remains so appealing — about Hop on Pop.

Bonus fun facts: There were a few lines that didn't make the final version ... and the final version has actually been challenged in one Canadian library.

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