One of the primary physical joys of drawing cartoons, or anything in fact. Like a little lump of modeling clay with a nice smell that actually erases! Works better than your standard pencil-toppers, doesn’t mess up your paper, can be reused almost endlessly, can be shaped into exactly the shape you need for it, and feels great to rip apart when your character doesn’t come out looking just as you want it. Run down to your local office supply store and get ten of these things, right now! Why they don’t recommend these babies to grade-schoolers I’ll never know, except the probability they’d spend more time playing with them than slaving over their tests. God knows I had enough internal distractions working on those things that I sure as hell didn’t need any external ones.