The weather is getting warmer, the days are longer, and you can finally get out of the house. What a great time to get a bunch of kids together for a playdate. Maybe you're really brave and are willing to take your kids and a few others down to the park, or maybe someone just came over to play in your yard. You're excited to finally have the kids be doing something outside of the house. All is going well until the kids start acting up a bit. Maybe you've got some five year-olds who won't stop with the potty talk, maybe it's nine year-olds who think it's cool to spit everywhere and you're grossed out. Maybe the kids keep running around the house and you're getting worried they are getting too close to the street. Either way you suddenly have a dilemma: You know how to discipline your own kids, but what do you do if it's your child's friend who is causing the problem? Here are my three simple rules for keeping the kids in line and your sanity in one piece.