It seems that one of the most challenging aspects of being a father is getting a genuine laugh out of your kids. It's as if children are conditioned to be embarrassed by the very utterance of words in public from their fathers. Even when dads crack the occasionally great joke (which, in and of itself, is admittedly a rare occurrence), most kids stifle laughter. At best, they have trouble suppressing the slightest guffaw. For a dad, that slightest guffaw means the world. In fact, it says so much…