I just went to wake Elena up from her nap - she was sleeping on the floor in front of a window, lights on. She was wearing: a diaper, long-sleeved pajama top, pajama pants, socks, one pair of Elmo underwear over that (the list thus far is all stuff I put on her when I put her down for her nap), then a pair of nylon summer-weight pajama pants, the matching pajama shirt (backwards), and 3 pairs of Elmo underwear to top off the whole thing.
Toddlers are so funny.
I took a picture, but it just doesn't do the situation justice. So you'll just have to imagine. :)