Taking the family to a ball game can be expensive. So can going to an amusement park or the zoo. With two small children, though, we try to do several things to build up our family, while not breaking the bank (Baby Step 3!). Here are some we have done or that we’ve thought about and may do in the future that your entire family can do for $5 or less. 1. Play Outside. Not only is it good for the kids health, it’s fun and free. It doesn’t matter if you have a huge swing set or just a small patch of grass, the kids will find things to…