We had a face painter just for the kids at our wedding and even the adults got involved, having tattoos done. But there's a pertinent point to be made here... if the children are from a previous marriage, DO have them involved. There are some great ceremonies that include jewellry to daughters, watches to sons. But do NOT make their role one of handing out programs, ushering, etc. I had this happen to me when I was young. It felt demeaning. It's important that the ceremony include them in a meaningful way.