In Norway my children sometimes came home from primary school (ages five to twelve) with notes saying things like:
"We've planned a trip to the woods for next week, it's expected to be minus twenty Celsius so please make sure they have appropriate clothing, hats, gloves, boots. Also we will have a fire so make sure they bring some sausages and a hunting knife so they can cut sticks for the fire and to hold the sausages over the fire."
No. 2 son came home with a plaster on his arm after one such excursion, I think when he was about ten, and explained that one of his friends had been careless with his knife. There was no drama, the teacher carries a first aid kit for precisely this scenario, his friend was firmly told to not be so stupid, and the teacher used it to explain to the class why knives need to be properly handled.
In the 90s I was taught knife safety before being given blades. Had to pass a test before we were given them. Seems pretty reasonable to require that to handle something that could kill another person so quickly, easily, and even by accident.
Also much cheaper than casts, physical therapy, and possibly permanent damage. An ounce of prevention and all that.
My 5yo got plastic kitchen knives for her birthday which, while pretty dull, are still good enough to go through zucchinis.
A test wouldn't work here as she can't read yet (not full sentences at least).
> In the 90s I was taught knife safety before being given blades. Had to pass a test before we were given them.
You can teach kids how to safely handle and use blades. This reduces -but does not prevent- accidents... and some kids will handle them carelessly despite the training. [0]
In other words, the fact that a kid on the trip was cut by his friend doesn't mean that there was no blade safety training prior to the trip.
[0] Source: In another life, I used to teach kids these sorts of safety courses.