looking for a specific type of robot

Is there an off-the-shelf robot that would work like a robot vacuum in that it will move around the room in some sort of defined program? It does not need to be a vacuum at all in fact it doesn’t need to do anything at all except for roll, so it could be much smaller than a vacuum. I’m basically looking for a proof-of-concept robot that just does the motion functions of a vacuum. Any help would be appreciated.

submitted by /u/NortheastSnow
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