Faible and I work at Fanime as Stage Zero hostesses. We announce stuff and explain the games. This game is Jan Ken Pow, which is basically rock paper scissors with a twist. The winner has to hit the loser on the head with a squeaky hammer toy before the loser can cover his head with the helmet. If he can't make a successful hit, no points awarded.
Faible and I made our own heads the days before con. We barely finished the armsleeves halfway through con. That is Faible's very first head.