LOL, the first thing I thought of when I saw this thread was Patti's firecrackers! Glad she got you the link already. . . .
For another idea you might be able to work with, I did a
punched silver star card for an Operation Write Home blog hop. You could put something like that on floral picks and add to your centerpieces.
Heck, you could even make 'em 3x3s with gold stars, and have a different little fact about your sister and her accomplishments on the inside of each one--all the 'gold stars' that make her the best choice.
People might get a kick out of checking them out. . . .
Be sure to show us what you end up doing--and good luck to the candidate (she *is* pro-stamping, isn't she?)