When I was a child, I used to run my hands on rocky walls and running water fountains. In class, I would smell wooden pencils and toy with the heft of a pen. I stabbed my arms with mechanical pencil leads. The good ones would stand on your skin and it was good for "special effects" if you ever had to pretend you were pierced by an arrow. I drove my teachers crazy by stacking the contents of my pencil case if left idle, even in the middle of an exam.
