It's A Magical, Wondrous Place

I saw this while driving an alternate route home a while back.  Please click the picture to enbiggen.

Yes, that does appear to be a shed on a trailer made into a public restroom.  
Yes, it is called the "Tinkletorium".  
Yes, the little people icons are all crossing their legs.  
And finally, yes, I do believe it is still for sale.