One of the oldest and most widely known category of puzzles, is the interlocking.
In very few words, you take a bunch of pieces and end up connecting them
(usually in some ingenious way) into a single solid object.
The materials could be from heavy types of metal to matchsticks and paper!
But the most common material used is (by far) good quality wood.
Some require balancing skills and as many arms as an octopus to put together,
while others require some sequential moves. Others need some synchronised
movement, while others may even require some mystical tricks!
Here is a nice photo of a good example:
matchstick_interlocking.jpg [ 87.45 KiB | Viewed 1020 times ]