We also found a dozen or so baby ring-necked snakes in the house over the course of last summer. No idea how they got in or what they were looking for. Ben tried to keep one as a pet but set it after realizing we couldn't possibly catch crickets small enough for it to eat. Did I say "we"?
From here on out pets are the kids' responsibility. I gave Allison permission to buy 2 hermit crabs this weekend after making sure she understood that I was in no way going to take care of these things. Jay just rolled his eyes. We have already decided that our next "pets" will be chickens.