My 8 year old is reasonably responsible. When we go out hiking or camping, he is "issued" an old Air Force Pilots survival knife that has had the tip rounded a little and the edge "de-tuned" a bit. He can cut, hack, chop and dig to his hearts content with it and be an 8 year old boy. At the end of the excursion, it goes back into Dads toy room until the next time he needs it. But, the pressure is on for a full time pocket knife. We live a little out in the country, 10 acres and room to explore. I was leaning towards a SAK Soldier also a little "De-honed". When he gets old enough to notice its not real sharp, I figure he will have gained enough experience to handle it a little sharper. He knows not to carry it to school. I think I started carrying a knife around full time when I was about 10. Need a little advise on this one. I know every kid is different..just some general guidlines or, criteria YOU used to determine when your boy got his first knife.