Good stuff. I loved watching my two grapple with money, especially the first one. I remember she was four or five and did storytelling on the beach in front of the place we were living at the time. That one summer she independently decided to charge the local kids. She came up and showed me a nickel, a penny, and a quarter, and said proudly, "Here's my pay." We had no idea where she got the word pay, as we didn't think we used it, but she'd definitely got the idea of providing a service and getting paid for it.