Due to being taught about knife safety, my kids can tell you where major arteries run and the type of injury you would get if you leak in different places, including estimated time of unconciousness and death!
They know a cut to the fingers or hand is sort of expected, and will be taken as a lesson in itself, but their record is quite good up to now. However if they manage to cut themselves anywhere else it is a whole different story due to the possible severity of the injury.
The only time I have any worries about their knife use and attitude toward knives is when they have friends round, but they are aware themselves of the possible dangers and they get stashed away before visitors, so there has never been a problem.
They only "problem" we have ever had is trying to get through airport security with a carry on daysack, when the staff reacted I automatically thought I had left something in my bag, even though I had thouroughly checked it before I left! Turned out to be my 12 year old daughter had left a multi tool in the bottom of her bag
, we had been out a few weeks earlier and it had been tucked away and forgotten about
, till we went through the x ray machine! She got a little bit of stick about arms smuggling for the rest of the holiday but airport staff were very good about the whole thing, it was dealt with really well and after double checking it was legal to own we offered a stamped jiffy bag, for a £3 charge, to send it home in.