Not just for kids...

Friday evening was the Rock Paper Scissors St. Louis Tournament of Champions at the Science Center. The single elimination tournament was open to anyone who wanted to compete.

Marc Elliot(right) came out on top, winning a $150 Pepsico gift certificate and a golds gym membership.

The event featured contestants of all ages and included a prize for best costume.

World Rock Paper Scissors society founder Graham Walker(right) spars with tournament director Chris Files(left).