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Don't want to pay the postage on a bag of sand..
However, a nice drawing of Muhammed, done by every South Park viewer would probably send a message..
It doesn't have to be especially good, or witty, just a simple, heartfelt drawing of Muhammed, done in the medium of your choice...
You may send it by snail-mail, or scan it into your computer, and send it by email as an attachment..
Send your personal cartoon of Muhammed today..