I have Mardi Gras beads hanging from my mirror that we caught at a parade in Louisiana last year. I don't have a bumper sticker but I have those little white stickers in the corners of my back window. One is a little girl and the other is a little boy.
Oh, my husband just put a big "T" (Texas Rangers) magnet on the back of my SUV. It was too big for the back of his Mustang so he stuck it on mine.