Sometimes there's just too much to do

We are blessed to be in a place with lots for the kids to do and to have the means to be able to do some of it. Its hard to choose what to involve the kids in. They enjoy a variety of things and would happily participate in whatever we would allow, but the more we are away from home, the crazier life at home gets. Right now we are playing soccer. Its three days a week and it feels like our life revolves around it (yes, I hope for a practice or two to be rained out!). In the last week we have had opportunities to get involved in Tae Bo, piano, 4-H, boy scouts, brownies, and an art class. For now the piano is the only thing we have chosen to add into our routine (on Saturday- before soccer). The rest will have to wait for now, but there is some guilt associated with not letting them participate. They all are great activities and several of them are things we really want to do but we have to find some balance. Its hard to know when to say no and when to say yes. Are we passing up great opportunities or picking the wrong thing? The constant questions are a part of being a parent, I guess.