Trading Sports Cards

I always used to trade sports cards when I was a kid, and I am wondering whether or not this type of card trading is still popular with kids. Most of what I have been hearing about lately is cards that are used to play games and involve fantasy characters. Do any kids still trade sports cards? My son really likes sports, so I was thinking of getting him some cards, but I don’t think it would be as fun for him as it was for me unless he has friends to trade them with. Maybe I should get him some of the non-sports cards instead.