'Usherettes' question

I have 2 Usherettes - (a made up term that they just love) my cousin and neice, both 9 years old, both asked to be our flower girls. We decided no kids, so we made them the official passer-outters of the flower cones and are calling them usherettes.

They can't hold a kissing ball, and a head wreath is a bit much for the small role they have. They are both so tiny, I think a wrist corsage might be bulky, but something on their clothes seems to adult.

Where can I pin/affix flowers to them to show they are special?? Any suggestions?