Not really pencil and paper, but when I was a kid I remember using the pencil itself as a die: shave off the ends of a hexagonal pencil (or just etch in to the

Not really pencil and paper, but when I was a kid I remember using the pencil itself as a die: shave off the ends of a hexagonal pencil (or just etch in to the wood). No skill involved, but I spent a zillion hours playing "cricket" by writing "dot ball, 1, 2, 4, 6, out" on the edges. Then you spin the pencil in your hand without looking and slide your thumb up the edge. Whatever you landed on was the score and you marked it down on a score sheet. As a bonus you could easily disguise the action as fidgeting - so you could play during class.