Remember those annoying little tamagotchi keychain games that were all the rage in the last 90's?  The goal was to raise your little animal by hitting buttons to feed or train it.  Jeremy Toeman points to what I call "Analog Tamagotchi"- real plants and cactii on a keychain.  Just a little water every few days.  Eventually these can be moved to pots to become full-sized.  Or you could just kill it like I do most of my plants and carry around a plant corpse, noting you're too busy to water it.

Source: LIVEdigitally » Blog Archive » Who’da Think it? - 5