I prefer that kids start with a knife with a blade that positively locks, while being easy to unlock as well. For a first knife, I would prefer just a blade, nothing more. However, the SAK classic is one of my favorites.

For a more experienced youth, I might suggest upgrading to a multi-tool.

I like that Grohman a lot. It'd make a fine skinner.
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The ultimate result of shielding men from the effects of folly is to fill the world with fools.
-- Herbert Spencer, English Philosopher (1820-1903)