The pen acts as a mic you sing into. When docked into the digital paper tablet, your vocal harmonies are automatically transcribed into a score. For the old schooler, you can write directly on the display. Great concept, wish it were in production.
Either get a boat or get a hot tub. Do not get a hot tub boat. It seems to me that a hot tub boat would sink pretty easily; I mean, it's already full of water. Hot tubs should either be stationary or they should be time machines.