Do what the kid on Bernie Mac did. Get little girls who are cute and adorable and no one can say not to, to sell them for you. If you have a little sister or something take her with you door to door and have her be charming and tell people it's for her. As an incentive for your sister to cooperate give her candy, don't become a sweatshop owner though like in the show, the girls will rebell and quit.
You can also set up a stand if it's hot where you live and say it's for some charity
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...oh man those people who took advantage of Katrina
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....but you can be honest and like sell the boxes for three dollars and then say you will donate one a dollar (so sell a box for three, donate one dollar) to a katrina fund. That way you aren't making a profit and they are donating to the fund and you sell your chocolate....kind of dishonest to use that....but not like you'll profit from it......maybe that's not the best idea, go with the Bernie Mac one
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