Three regular-sized sledgehammers placed at the base are the tools for interaction. The trick is when all three participants slam at the same time. The more simultaneously the three hammers are struck, the higher the tongues of flame travel up the giant vertical hammer itself. If the three participants get the flames all the way to the top, the hammerhead spins with shooting fires. The right timing is the essence game.

Ein Hammer by Mister Jellyfish and friends