It is said yo-yo's were origionally invented as a weapon. But as far as I can tell they were Invented to be a child's toy. Don't take my word for it :) I'm still curious too.
why are you asking
i believe that yoyos eat dog poo
yes They do sell Yoyos
They were invented in China in 2000 BC for use as weapons against foes.
no
yes
alot
of course there a Chinese yoyos in japanica, silly :P china and japanica are like this (crossed fingers)
metal
The 3 types of yoyos are: the classic shape the modified shape(moth shape) the butterfly shape
sure... why not?
YOYOS
They are very cheap.