Trivia: Was it absurd for Gregg Hurwitz to write that 11-year-old Henry bought his mother a new car? Believe it or not... NO! New York does not have a statute specifying a minimum age. Presuming Henry used cash (from his investments) to pay for the car, it was legitimate. Being able to buy a car regardless of one's age does not mean everything needed to USE the car will be doable. According to NY Vehicle Code, "You must be at least 16 to register a vehicle. You can title a vehicle at any age." (01:15:35)
Trivia: Although relatively rare and quickly dwindling, there are still some (100,000?) functional payphones (coin-operated or credit card) in the US, including in New York. It is doubtful there would be one outside of Henry's elementary school, but pay phones are typically near public buildings.