There's nothing wrong with a boy getting a finger cut, even if it takes stitches. It just improves the educational value of the knife.
Stitches are one thing.
I cut the tendon of my index finger with a freshly steeled SAK when I was 14. My fault, lesson learned. I took 12 weeks in a splint to heal (a whole adolescent summer!)
*BUT* a touch more pressure would have severed said tendon completely, resulting in surgery. As it is its a permanent injury.
A knife is no good to anyone if they can't open it, hold it or articulate it.
Some lessons are just too expensive. Its like saying "I'll buy him a car without a seatbelt so he can learn the importance of not crashing".
Sometimes the experience of others is the only way to learn the lesson in time.
The best way to teach him is time (yours) and gradual experience (his). If he's never really handled a knife before, you should probably limit his access to it to supervised sessions only to begin with, even at nine years old. I wish I'd had someone to *show* me the best way to do things when I was younger.
To paraphrase Mr. Eastwood... " A boy (or girl) has got to know his limitations" - and those of his equipment.
I'd recommend one of the smaller Opinels, no. 6 or 7. Carbon steel, simple lock, good grip, requires care but will illustrate the power of a good knife. Inexpensive (read "cheap") so easily replaced in case of loss or breakage. No reason not to supplement it with an SAK, though.
I'd also recommend teaching him basic first aid for cuts and making it an unequivocal rule to carry a first aid kit (even a cursory one) whenever he has his knife with him.
Good luck
Dom
[This message has been edited by Little claw (edited 10 December 1999).]
[This message has been edited by Little claw (edited 10 December 1999).]