You can use any shape. It doesn't have to be a bunny. Just trace a shape or cookie cutter. This would be cute for any holiday, just use an appropriate cookie cutter to trace and cut out the shape, then whatever yarn works best for that holiday!
Preschool Playbook: Lion and Lamb Mask. cool idea for kids, make them to fit your wedding theme. Add a paper baseball hat, umpire hat, microphone to stick for an announcer, maybe leave a strip across the middle for a mask or a few for the catcher mask?