* Consumer goods: He hoards old products, like phones, toys, and even a single high-heeled shoe.
* Junk: He gathers anything discarded from the spaceship that he considers potentially useful, like broken robots, parts, and trash.
* Plants: The most important item he finds is a lone plant growing in a discarded pot, which he carefully nurtures.
Wall-E's collection is a reflection of his fascination with the world he lives in and his desire to understand and hold onto memories of a bygone era.