What about drugs as an alternative?
All this engineering is very worthy, but it seems a lot of effort to go to just to give a handful of people a temporary high, when there are already a lot of brain-altering substances out there which could do the trick for a lot less.
My alternative approach would be do dope the 'passenger' to the eyeballs, stick them on one of those moving plastic dumbos that you used to find outside Woollies in the 1970s next to the plastic 'spastic society' mannequin and insert a 10p piece.
Not only would the punter obtain great enjoyment, but passers-by could also derive some entertainment.