In a world like today - How do we keep children, children?

My DS is 14 months old, and we want him to be a kid as long as possible. We do things as a family, watch appropriate tv shows, play with him everyday, read as a family, We try to teach him our values, and limit his exposure to those bad influences. Sure, he'll see them eventually, but we want him to have a good head on his shoulders when he does. We're hoping to be able to homeschool him, so he doesn't have to worry about all the marketing at school and the problems that come from those kids who aren't so innocent. It might be a bunch of pipe dreams, but we're going to do our best with him.