My boys have been working all weekend on this Webkinz fortress - complete with a weapon manufacturing facility, bunkhouse, and discothèque. It was an elaborate setup, though I had to draw the line at taping blankets to the wall.
Sadly, my hubby had to remind me that these days are numbered... that our soon-to-be middle schooler will likely move on to other interests. Older kid interests. For now, I'm going to enjoy their creative use of tape.