lightbrite Interesting concept marketing pens in the shape of pacifiers. It would solve the problem of eraser chewers as they could chew these pens and the pens could come in different flavors.
As far as the eraser is concerned no hechsher is needed for the following reason:
A) The amount of vegetable oil is minute
B) Erasers are not a food.
The same question can be asked about a child’s thumb sucking, maybe he touched something that is not kosher and is ingesting some of it when he sucks his thumb. Also the thumb is an organ and you child is alive and it prohibited to eat a limb of a live animal. You might hold that it’s permitted because he isn’t consuming it,and so it’s less than the required amount. But we hold taste is like the prohibited items. So if a piece of hot meat fell into milk and you took the meat out if the volume of milk is less then 60 time the volume of meat then it’s prohibited. Do your kids thumb need a hechsher? I think not. You can always ask a rabbi
Please note this is only my opinion and is not to be taken Halocha limiser, as Jewish Law, nor as coming from Moses from Mount Sinai. The last thing I need is the IBT (International Brotherhood of Thumb Suckers) picketing outside my house so try not to publicize it.