By his own design, though, WALL-E has become, over time, an endlessly curious garbologist who collects objects that strike his fancy -- an eggbeater, a sheet of bubble wrap, a Rubik's cube, a paddle-ball, a Zippo lighter, a brassiere (he experiments with it by putting it over his eyes) a diamond ring in a velvet box (he tosses the ring and keeps the box).
WSJ: 'WALL-E' Is Richly Human Tale of a Robot