Bet you were thinking of jigsaw puzzles, huh?
I've got a few of the old school puzzles. The steel ones where you have to get one funky part of it off without breaking it apart(as many people tend to try and do after just a few minutes).
I've got one that's medium difficulty, I'd think, and I can get it done in a minute thirty, which is cool(or nerdy). Another took me weeks to figure out and when I tried to put it back together I ruined it and cannot for the life of me figure out how to put Humpty right. Even with the instructions I just can't do it and it's been like that for over twenty years.
Came across this dude who does some really extreme puzzles. High tech crap that you really have to spend some time with. I've quite enjoyed the few I've seen and will definitely be watching more.
This one is my favorite right now.
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