I think he would be very happy with the recent one-hand-opening Victorinox Trekker.
As a boy scout, it is -in my opinion- more interesting to have a number of useful tools in a handy package than to have "only" a blade, even if it's very good. It would be terrible to hear of a broken tip of a blade because he tried to open a bottle or a can with it.
The boy will appreciate that he can open the Trekker with one hand, the quite ok blade locks, and it has a (lockable!) bottle opener, and can opener, a saw etc. Just see the pic:
It has quickly become one of my fave SAKs, together with the aluminum classic Soldier.
ps:
The Tenacious offers really nice quality/price, but... you can see this coming I guess... it's made in China.
I love it nevertheless. But for this specific usage, I would rather recommend the one-hand SAK.