Whether you giggle or guffaw, laughter is good for you. Tickle your kids often, and indulge in more than a few chuckles, chortles and cackles while you're doing it. Laughter reduces stress, boosts your immune system and prompts the release of those feel good chemicals -- endorphins. Children love to laugh, and their laughter can teach you something important. It's hard to stay mad, discouraged or unhappy when you're laughing. We dare you to try. The next time you start feeling depressed, laugh -- it's an antidote for the blues.