DIY Kids Wedding Favor Box with free coloring sheets. Candy necklaces would be cute for the girls. Plus some disney princess stuff, because every bride wants to feel like a princess on her wedding day and to little girls, brides look like princesses!
Great idea as the kids wait for their turn to open their gift! - "Color Me" Interactive Gift Wrap for Kids - wrap a gift with plain white paper, and attach crayons instead of a bow. Stamp the words color me, and let your kid decorate their own gift.