OK, I'm thinking a couple of years off here, but knowing my son I need to get my arguments in a row before he actually hits the milestone. He's one for technicalities and loopholes.
Ds is 10, nearly 11 right now. I'm not planning on having him sit in the front seat until he at least hits 13. My dilemma is this: He's a tall, skinny kid. He's 5 feet right now and starting to grow rapidly. He'll probably hit 5'2" or 5'3" in the next 8-10 months. Technically, according to most guidelines I've read, he'd be tall enough for the front seat. Except of course, that his bone structure will be that of an 11 year old.
Even after we wait until he turns 13, if his weight/height keeps pace with his current growth curve, he'll be about 95 lbs (fully clothed and dripping wet), and about 5'6" tall at age 13. Is 95 lbs enough to be in the front seat with airbags? What's the minimum weight?