There are many variations to the traditional balloons and flowers centerpieces that are often used for tables at a communion or other large gathering. Although balloons and flowers make pretty centerpieces, lollipop trees and tiered cupcake stands are a lot more fun and original. Pop-ups are also a popular centerpiece choice. You should be able to find some themed items such as crosses at a party supply store. There are many cake toppers that can also be used for tabletop centerpiece ideas.