Same in Canada: 

i) Juveniles can use guns provided they are supervised by a licensed adult. Juveniles can even get a gun license in Canada, and shoot under supevision.

ii) The US constitution allows individuals to buy a gun and to buy the services of a doctor. Nothing is for free in the land of the free. Nothing obscene about that, unless you think that you're owed something for nothing. 

Lets face it, the value of life in America is reflected in the harsh punishment meted out to those of take it away. In Canada, punishment is mitigated by one's socio-economic background, mental state and ethnic background ('he's really a good boy, your Honour; he was just turning his life around and plays with his little cousin on Sundays'); so he's let off in a couple of years on a murder charge.