Wedding invitation question?

So nothing my fiance and I do is traditional, We had our daughter a year before we set our wedding date. She is our flower girl. So this is my question. We have ask our little nephew to be our ringbearer, and his 10 year old brother is one of the groomsmen. Do we send an invitation to the family, the mom is one of my bridesmaids, or to an invitations to each of the ones in the wedding party? Please help.