There is a list of common and traditional props, such as bubbles, balloons, glasses and fake moustaches, hearts and letters (such as LOVE or I DO). It is always a great idea to think about something that is personal to just the two of you, and has some kind of connection to your love story. For example, if you met playing volleyball, you may consider including that into your wedding (through decoration, like table cards or invitations). Think about “your story”, and if it sounds like fun, go for it! It is your wedding, after all!
One very cute tradition I recently noticed among bride and groom is to exchange presents and love notes before they see each other. It creates very nice moments for pictures, and also sets a mood for the day.
Other thing that bride and groom do is “the first look” or “the reveal” – the moment when they see each other for the first time on a wedding day, all dressed up and beautiful, if it is not happening at the ceremony the way the day is developing.