We were given the challenge in class of creating an invention which Leonardo Da Vinci hadn't previously thought of...well it seems he came up with ALOT. Even so, I tried thinking of things which i find interesting, what do i enjoy? practical, non-practical, I don't think it really mattered, so i went with practical. I love books...not necessarily to read, i love looking at them, so my invention was a light which fits to a book!
I later found its already been invented, never mind i like to think i thought of it first.