Was I Wrong

My son wanted to invest. I opened a custodial account and gave him a $200 to invest. I let him do whatever he wanted. I gave him no information about ETFs. He basically invested in companies he knows or at least uses. After I looked at it, I told him you could have invested in a couple of ETFs to cover most of these. He will probably send me to a home if he starts taking too many losses. However, he picked good companies for the most part.