Aim of Life Is To Not Know The Aim of Life

Oh my fucking god!
I had this wonderful and fantastic idea of an entry this morning as I was travelling to school and now I forgot what it was.
Why isn't there a device that can record are thoughts or like a electronic note books that wen you press a button and then think of something, that thought would get sent to the note book and appear on the screen on the note book.
If anyone ever invents this kind of device, they are pure geniuses and I will spend my life worshiping them.
So, please...can some just invent a 'thought-note-book'.