When my kids were younger and playing in Little League, the parents had to take a turn working in the "Snack Shack" on Saturdays. My husband and I always enjoyed it because it was an oppurtunity to work with all the kids. I can't tell you how many kids we taught to make change over the years. Make change for the first dollar first and the rest is easy. I was always surprised that these kids weren't taught how to do this in school like we were. It's funny now that when clerks have a computer to tell them how much change to return and they still get it wrong. Maybe we just need to go back to the old Cash Box! LOL