Lifting, carrying and being told what to do.
have him wear some decent work boots, jeans, and other clothing he doesnt mind getting covered in shit
if he wants to really show off, have him get a tool belt and buy a speed square, a pencil and a tape
then they will see that he is interested in the job and keep him around
just make sure he doesnt turn up wearing trainers
its basically a fucking hard physical job
another great peice of advice
make sure he always finds something to do
if he runs out of what he is doing, have him pick up trash or sweep up or something
that way he wont get shit canned in one week