Glad you found this website. It'll help you focus and help your son focus his energy on getting to the next level. Make sure you read the recruiting timeline link so you know where you are going.
Probably the best thing to start with is sitting down with your son (when you can snag him for a few minutes of serious thought) and get him to list the things that are important to him in a college. Remember, he is 16...so don't be surprised if he says "Good food" or "No homework" at first. The key is to get him to think about what he'd like study or where he'd like to live (year round sun, four seasons, west coast, south, city, town or country). If he has always been a very serious student, he's probably got a few four year colleges in mind...if he's not gung-ho school, consider a good two year college where he can get his academic feet wet and still play serious baseball. You will probably have to digest a lot of information \ and regurgitate it for him...because it is a LOT to consider for most kids..particularly boys who play baseball.
Pictures paint a thousand words: if you see a college that looks interesting..send him the link to the video tour on the college website (if they have a virtual tour)...might stimulate him a bit!
Good luck..post all your questions!!