I had my daycare party this past Saturday. I rented the OEYC, had a reindeer food activity for kids and their parents, hired a Santa and put on a buffet. It was a wonderful party and I host it every Xmas. I was also thinking of doing a summer beach party where parents and kids come and play together at a beach themed party in the back garden. As for a concert, unless I had an age group of exclusively 3+ I would not do a concert. I think it's a little unrealistic for it to go smoothly. We still sang Christmas songs as a group at the party but otherwise it sounds like something for kindergarten and older.