Eat your pencil?

Lots of people have become serendipitous inventors, and if and when their brainwaves have found big markets, they have sometimes become suddenly and enormously rich. I refuse to believe that all of them deserve particular admiration for being talented - think of the inventors of chewing gum and cellotape and hair dye. 

Not everyone has the inclination for it, either. I have had brainwaves over and over again, but never bothered to run to the Patent Office. Here's one such for public consumption. Watching my pupils chewing or sucking away at their pencils and pens, it has struck me that someone could make a killing by manufacturing edible writing instruments. They could come in a variety of flavours, too. I have seen pencils with scented erasers stuck to their behinds, I have seen pen-pencil combos, but I haven't seen ones that can be eaten. Has any reader come across such things? If not, and if someone does manage to make a big hit by launching such a line, s/he might remember that it was my idea, and at least acknowledge the debt. I wouldn't mind if I got paid, either :)