Danish science demonstrators Fysikshow know that explosions and fire are a, well, sure-fire way to get kids learning about science. To that end, they created the Pyro Board, an audio-visualizer made up of 2,500 bunsen burners. The board is an expansion of the Rubens’ Tube, a more simple row of flames that reflects standing sound waves. When you put on more fire, it always gets better,” Sune Nielse