So I did the math. If you put in $100 a month and made 12% a year in returns - which would be an awesome return on a college account - your ten year old should have $23,000 for college. That isn't even close to room/board/tuition at a University of California school in state for a year. The cheapest Cal State school would be Stanislaus or Fresno, at just under $20k room board and tuition. So you have a year - in 2016 tuition rates. Granted, its a lot better than most people, but I think you'll find yourself short.
Or maybe you'll end up like me. I saved for two and my son is going to trade school - $6000 for his first year, then the Union pays for his school.