The younger kids get adapted to computers the better off they will be later in life. FB is now raising a new generation of kid...imagine when you were 7 years old and you had the friends Billy, Jane, and Robert. Does anyone 20 years later remember, talk to, or even know where the old friends live? Now with FB you can keep track of, in contact with, and follow whats going on with EVERY SINGLE FRIEND|PERSON YOU EVER MEET. EVER.
Thats every single real life and online friend you ever have ever. How many friends would we have now and how many business acquaintances would you have now if you stayed Billy, Jane, or Roberts friend from kids?
Let them on Facebook, they will learn, grow, and learn to deal with life just as easily as if they were left out in the woods with nothing.