My husband is a numbers man and when my now 13 yr old was born he had hers set up and ready for 529. Over the years, we have allowed our investment guy from Edward Jones to handle more of it so that we are not as "emotionally attached" to the ups and downs of the market.
At this point, she is fully funded and we are in the transition where we are moving it around some to make sure she will stay fully funded.
The idea of the 529 is so great because if by chance your child does not use it (scholarships, etc), his/her children will be able to and so on. We feel better knowing that what we have set up will also be assisting our grandchildren (if she has any). It is transferable within the family (at least ours is, as long as it is used for education)
Another perk to the 529 is that when my daughter wants to use the money for something else, I know my broker will make sure she makes the right choices by explaining how much tax she will pay by taking out the money for something other than education!!
If you don't have a broker you use and if you are not that familiar with the process, try your banker or the websites provided as someone else said to learn more about it.
You are not going wrong providing for your child. Kudo's to you, K., for thinking ahead and taking this responsibility. for your son. So many parents are not willing to give their kids the jumpstart needed which can make or break your child a long way down the road.
Good luck.