The Yapper-Nap appeared in The Wubbulous World of Dr. Seuss episode "The Cat in the Hat Takes a Nap."

Everyone in Seussville is afraid of the Yapper-Nap, but all he wants to do is take a nap. If he does not nap he will start repeativly say "Yap!" Sarah Hall-Small is the only one who isn't afraid of him; she sings him a lullaby.

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