Estaba pensando en que pasaba si lo cogias con la boca, y veo que han pensado en ello:
"What if I chew on my pencil?
If you are in the habit of chewing on the end of your pencil Sprout will probably activate and dissolve in your mouth. We think this is a great tool to break yourself of that habit. On a lighter note, Sprout is entirely non-toxic!"