With colder weather blowing in, it’s time to start thinking about indoor activities for the kids. Parties in particular require some tricks up your sleeve if you’re hoping to keep a house full of children occupied. I know this firsthand. My family lives in Wisconsin, where snow covers the ground a good five months of the year or more. Since both of my daughters have winter birthdays, you can imagine we don’t sit around the pool eating cake. I am forever confined to hosting indoor, heated birthday parties. Over the years, I’ve discovered plenty of creative ideas for fun indoor …