I think the idea is a riot. In a book I just read it said the kids between the ages of 6-and I think 12 love potty or gross type jokes. Silly Billy AKA David Kaye
Welcome to SillyMagic.com talks in great detail what kids find funny. He says in his book that he does a few tricks that other entertainers would consider a little off. His book was well worth the money. Personally I think that your show should reflect your personality. If you are a goof ball and think a gag like this would fit...then do it. On a side note a clown was selling a prop similar to this on ebay. It shot smoke out of your ears. Just type in clown props…seller I believe is under ronaldclown