The house is in Fort Worth. But I don't have a key and wouldn't do it or even have anyone do it, if I had one. The kids are wonderful and I love them, but they are also very private, somewhat reserved, and and don't appreciate interference, which is why I said I "gently suggested" that they donate what was left in the house. The reply was "we are donating it, to the man who bought the house." So I had to let it go. They close on the house this week, I think, anyway, so it's moot now.
But thanks for the idea! It's a very generous thought and offer!