It cannot be an agility game because
it has no integral power source. It must be
tethered to a power source. I guess that it draws
power from a PC through the USB socket on the
Duemilanove. The suction cup will only adhere to a
smooth surface so it must need to be fixed to
something smooth. Assuming that the headphones have
their own jack plug, the additional plug must
deliver an audio signal into the device. Does it
somehow 'enhance' an iPod or mobile phone by
modulating the music according to movement? But
then what does the LED display add? And how
persistent is the push button?