Farting is more fun than poo.
http://www.jboom.com/poo-price/
#1 http://www.heptune.com/farts.html do this one first
http://www.zthing.com/zthings/oops.html
burger king is better than mcdonalds
http://www.mcspotlight.org/cgi-bin/zv/debate/kids/messages/240.html