Use card stock and misc buttons to make your own Christmas cards. The card stock can be bought at Walmart, etc. or at most any craft store. The buttons come in bags at most craft, hobby, or fabric stores.
Christmas Craft Project: Advent Calendar-- think I'll sew some small, reusable cloth bags, and find a slightly different way to arrange the clothes pins, so that there's more space for the bags. Love the idea of painting the clothes pins, though!