Wait till he sees this

And from the looks of things they all ride the short bus.

And if I was underage I wouldn't be playing airsoft. I would be playing something else, ie hockey, paintball or whatever. Airsoft isn't going anywhere so I don't see what the rush is. Yes sometimes it's easier said than done, but patience is a virtue. 13 year olds with realistic rifles is not a good combination knowing some of the meat heads that run around with them. You might think your mature for your age, but not all your little buddies think that way and tend to try and do stupid things. Grow up a little first then play.

We all waited till 18 to play (or 16 if your lucky)

Its as about the same getting your driver's license.

Ok I can understand if parents is at least watching or guiding how to play airsoft.
Instead of dropping them off, leave and come back to pick them up, and don't give a rats ass until someone gets hurt.
one more thing...

KEEP YOUR FKING FINGER OFF THE FKING TRIGGER!!!

Airsoft is a toy yes, but none the less we treat them like as if it was real firearm.