You should have charged him for you to supervise the kid building the computer. It was invaluable experience putting my first computer together about 20 years ago. Two companies I ordered from went out of business before I could assemble it and amazingly one replaced faulty RAM.
If the kid wasn't 9 and assumingly oblivious I would have. I nearly zoom walked a 13 yo into reassembling the pc I gave him (that he dismantled) but his mom ended buying him a new one.
I still feel guilty charging $500 for an old bulldozer cpu paired with a rx370.
Well.... money isn't such an issue with this customer. And to be fair, with all the rgb fans and and a verified copy of windows..... in today's market. It wasn't too exuberant.
Yo, listen up, here's a story about a little guy that lives in a blue world.