I found this blog of a little girl's visit to the SST set back in 1998: there's a few interesting shots including the old Monster Daycare clubhouse, Hooper's Store, and a couple of pics from the taping of "Telly Tut," including Joey taking a picture with the little visitor with one of the Egyptian AMs.
http://cliffmama.com/kids/December98.html
http://cliffmama.com/kids/December98.html