Three years http://xxx-x.in.net/ xxx hd Since Lane received a grant for her elder son, four-year-old Sawyer, the money has grown by $200. Her two-year-old son Ian's account has grown by $100. If each account grew by $50 per year, each child would add $900 to their college savings by age 18 for a total of $1,400 thanks to the initial grants.