S.K.
L.,
You are smart to start early. It is estimated that by 2025 when your son is 18, it will cost $140,000 for him to attend state college for 4 years.
Our family set up a 529 college savings plan with Putnam for our children. It earns about 6-7% interest annually and is eligible for tax shelters because it is used specifically for college. If you can put about $75 per month away in a fund like this, you will have enough to pay for college by the time he goes.
Our financial advisor also suggested that we have our children take out student loans despite the fact that we have the money to pay for college. Why? Student loans are interest free until the student graduates so you can keep accruing interest for 4 more years in your savings plan. Then your child can pay off the loan when he graduates and start his adult life with a great credit record.
Best of luck,
S.