The lesson with the doll house money is going to be a great one. My daughter counted the money and added it all up again herself, which was good math practice for her. The amount seemed large to her, but she shook her head "no" when I asked her if she thought that much money would run a real home for a year.
What I am going to do is have her subtract the amount of any house-related expense from the total, and we'll see how fast this money is gone. (It's a good lesson for me too!)
She was astounded at how quickly the money dwindled down in just one day of bill paying.