OMG Ryota!!
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Click on the link to the video player of your choice to see this adorable little just turned 5 year old complete the final stage of Dance Dance Revolution. You have to do two steps at a time throughout most of it. Crikey. I've never gotten past the first stage, because I suck. I have great hand-eye coordination, but impossibly crappy foot-eye coordination. I can't see the moving arrow on the screen and then relay a message to the foot in time to execute the move, and this kid is seeing and doing two arrows at a time. Cannot wrap brain around this. Watch how fast the double arrows move up the screen! Also linked
here.