Sarah at the Wedding (Ian and Sarah) - Pauline Oud
Cute and short picture book. There is an actual story about the kids getting ready for the wedding and the wedding itself. It also questions that your small child can answer by pointing at the pictures. Like What did Dad loose? They would point to the picture or say socks. Also at the end of the book are some cute craft projects, a wedding veil and hat, that could really get the little ones into the story.