My brother is 9 years older than me and when we were growing up, I always used to borrow his toys because they were so much more interesting and intricate than mine.
I was very curious about how everything worked and would often take things apart to understand their mechanism (I was not always able to put them back together... :-)
I loved playing with brain teasers and puzzles and generally solved them pretty quickly. The Rubik's Cube, however, has always been and remains my nemesis.
This is my brother's Rubik's cube from when I was 10 years old. It is still in pieces, but oh so close!