Eh, sort of. I mean, they're officially intended "...for people whose first language is not English." But stuff like that postal address joke seems more like it's intended for people with some sort of learning disorder. Honestly, I could've sworn that as of like, 3-4 years ago, Simple English Wikipedia WAS intended for people with learning disorders. >_>
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http://www.nbc.com/parks-and-recreation/exclusives/ron-dancing-animated.gif