V.W.
You could use cardboard and wear it like a sandwich board...
Either large cardboard boxes broken down or maybe buy display board (the thick poster board).
Maybe spray paint the cardboard a nice light tan balsa color. Then get black fabric and cut out the letters and point values and glue them onto the painted cardboard. Attach the two pieces of cardboard (front piece with the black letters and back piece plain) with shoulder straps (use ribbon or yarn or something similarly easy to work with) and you're done.
Sounds cute. What word are you planning on being?