JMHO, since the target is fund raising for a school, don't just target fisherman. Go for all the mum and dads and anyone who wants something cool and different OR buying just to support the school. Paint them pencils in school colors, put the school logo on them, paint them pink and add ribbons..... Offer to custom it with personalize name, message etc. This should give you a bigger potential customers.
Oh, You can even offer key-ring versions and save on weighting and adding hook to them