I've seen our son do wonderful things with paintball. As he maneuvers with experienced veterans in a battalion, he learns strategy and teamwork. He's outside in the fresh air. He's focused, because even a moment of daydreaming can get you painted. He can look to additional role models: real men in camo, not just a geeky guy in a bow tie.
I guess to be honest, when I was ten and spending a lot of my time in the woods, brooks, and hills around my house, my friends and I would have played paintball in a second if it were offered to us.