I was fortunate and started young and grew into working with the equipment I was issued withWhen I returned to college I managed to gain a few hours of employment with the college as an assistant to the instructor. One of my jobs was to administer the TAP(talent assessment program), I would have to observe and record the students results. It was interesting to see how people would become frustrated doing certain actions, like assembling large bolts and nuts in contrast to assembling small bolts and nuts. Working with electronics or being a dentist would require an individual who can work with small objects in a confined space. A heavy duty mechanic would generally work with larger items. Students could show frustration while trying to handle these tasks.
I hope I am making sense I am somewhat spaced out and tired.