Amy saw a $100 money in my wallet. She called out, "Dad, your are rich, one hundred dollars, ten thousand cents. That's a lot". Those days, she was learning money. She learned that one dollar equal to one hundred cents. I do not know how she got the number that one hundred dollars equal ten thousands cents. I may have told her about that. I could not believe that she could do the calculation by herself. She is only five years old and a kindergardener.