These mats are an extension of the incredibly popular dance video games that have taken China by storm in the last couple of years. Even seemingly sensible and reserved Chinese have yielded to their kids' demands and bought one to link up to the home PC so that they can step back and forth on the colored patches to the patterns on the screen and the sounds of buzzing and explosions and of course congratulory words like "yeah", "Get down" etc. (Might be a flash in the pan as they were all the rage last year but haven't heard anyone talk of them recently)