Your daughter's curiosity is absolutely admirable, and her reasoning, so logical for a child's mind, is what makes these moments unforgettable. My opinion for your friend: Congratulations on that budding little philosopher and economist you have at home! Those questions demonstrate a brilliant mind and a critical spirit rarely seen at that age. It's incredible how children can unravel the "magic" with their implacable logic. Connecting the topic to the inflation monster and the Tuttle Twins is a testament to the excellent foundation you're giving her. Keep fostering that curiosity, because she sparks great minds!