At this age he thinks you are everything. If you let him spend some of his money, make him save some of his money and begin having him pay for his own clothes, he will get the knack for budgeting and handling money. You will build a businessman!
One day he'll tell you these were the happiest memories. You'll have forgotten, but he never will. Lots of hugs, make sure you do silly songs, see to it that you piss yourselves laughing to and from each job. Discuss the work and get his opinions.
Remember to move in with him once he's made his first million, because he will!