There are a few apps that teach minors to trade. https://www.bloomapp.com/ is one of them. How do these apps work as far as taxes go? If kids start trading tons of diff stocks, who files the tax form? The parent? It goes on their taxes? How are 8949 forms generated for them listing every trade made by the minor the prior year?
It's fascinating to see his journey from a 14-year-old paperboy to a billionaire investor and philanthropist.