This is a good thread, just the kind of info I hoped to find by joining this forum !
I started giving my son knives when he was 10, when he moved up from Cubs to Scouts. I let him use my knives under supervision since he was around 6 for whittling and in the kitchen. At 10 I felt that he was responsible enough and that his hands were strong enough to use and to safely open and close a folder like a SAK.
I have taught him safe knife use and how to sharpen and care for knives and tools. He is now 15 and is responsible enough to help me with chores like cutting and splitting firewood.
He is now as tall as me and we see each other eye-to-eye and I find that this makes it harder for me to remember that he is still a kid! I am sure that we would all agree that we have to be responsible for our kid's actions until they are adults but we have to remember that boys will be boys !!
Two years ago we had a holiday in Norway, staying with some friends in their hytte in the forest North of Bodo, we had a great time with lots of fishing and my son was using his knives every day. We had an early morning flight home from the airport at Bodo, and we packed the evening before. I reminded my son to pack all his knives in the check-in luggage. He gave a typical teenage response and that sixth sense you develop as a parent told me he had not heeded the message.
The next morning in the check-in queue, we could see people being searched in the security queue, my son turns to me and asks why they are being searched. I remind him of our conversation the night before and he turned pale ! He had left a knife in his carry-on bag, luckily he had time to transfer it to the checked-in bags!
On another occasion my son was going to a Scout Jamboree in another part of Scotland. Transport was laid on and he was to meet his patrol at the bus stop in the nearby town. I drove him down there in the morning and the rest of the patrol gathered there to wait for the bus. They were all chatting away, and then one guy asks what knives they had all brought for the camp. They all then reached into their bags and sporrans and fetched out an assortment of blades. I immediately shouted at hem to put all their knives away and not to get them out unitl they are at the camp. Knives are being demonised in the UK at the moment and it is unwise to display a knife in a public place.
At the beginning of December my son's Explorer Scout leader organised a training camp to teach some of the newer Scouts camp skills like fire craft and safe axe and knife use. The leader asked the oldest scout to demonstrate knife use to the others. This lad had not brought his own knife and asked if anyone had one he could use.
My son offered his Opinel with the warning that it was very sharp. To demonstrate its sharpness he shaved some arm hairs. The older scout had apparently not seen this done before; he took my son's knife and tried to shave hairs off his own arm, but the inevitable happened and he started skinning himself! The knife lesson quickly turned into a first aid lesson.
I hope this post is not too long ! but I have found this thread so useful. I think it is important that us dads can share this kind of information so that we can teach our kids to respect what is a useful tool.