I'll certainly give Dr. Seuss this: he hasn't duplicated a theme yet!
Sure it's the oft-spotted John Cleese protagonist, but Dr. Seuss hasn't taken us to the CIRCUS yet, not in this entire long journey through the magical land of Flit.
As an aside, if I am ever told by The New Yorker magazine to stop showcasing their material, I assume it will be because of these advertisements. People sure like to look at them!
PS: ...but not as much as this post from 2007, which scores at least 1/3 of my blog hits during any given week. Either people are cheating on their math homework or they're awfully frustrated with their books of logic puzzles.