Mao and Hibiki Tap Dancing 舞音&響 タップダンスThis video is of siblings Mao and Hibiki tap dancing in Nagoya, Japan in June 2008. They're just plain awesome!!
(Note: The dancing starts after the introduction at about 3:30)
まおさんとひびきくんは なごやで たっぷだんすをしました。すごいですね!!