For MOH duty: Have each bridesmaid, mother, mother-in-law. create a scrapbook page which includes a letter to the bride along with pictures. This is something she can read the night before the wedding. The last page could be from the groom!
31 Impossibly Fun Wedding Ideas: instead of a kids table include a small bucket of crayons and coloring books on each table, with a sign that says "for kids and adults who love to color". Or something similar to that phrase:) kids area, let them be free!