I had a pocket knife by the time I was about 7 years old...a boyscout type that was probably a lot like that Victorinox folding butterknife.

But what I really remember as a cool gift was a magnifying glass.... I remember inspecting and frying many ant hills, started leaves on fire and even did some wood burning projects (like my initials burned on a board). I don't remember getting in trouble with it....not like the pellet gun I had later during boyhood...