Naming robot body parts

The concepts, "touch left", "touch right", "touch front", and "touch back" have been given to a Lego NXT robot by touching sensors at those locations in association with language input of the respective terms. The more general concept of touch is then learned at the next higher level in the hierarchy.  One can similarly locate and name any number of body parts that have input sensors.  Internal organs like the battery and recharging circuit can be identified with the sensation of "charging", "high charge", and "low charge." Categories like "right" can also be learned at a higher level in the hierarchy by association of experiences with "touch right", "turn right", etc.