I'm putting together a litter bot (to pick up litter, not to drop it!) and it's incredibly how simple it is compare to hobby robotics, say, twenty-five years ago. You just plug things together and then write some code (which you can also do by plugging things together, e.g. Scratch.)

It's almost anticlimactic.

(Speaking of which, I found a Roomba in the dumpster. I'm thinking of putting a costume on it and calling it done, but that would be more of an art piece than a real litterbot, eh?)

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Anyway, contentment comes from within, it's not intrinsically dependent on any external condition whatsoever.