"There's one particular buried city that's supposed to be super super forbidden, for no declared reason, and my guess is that one is just a trap for people like your son. Possibly where they manage to cleverly make their way past all the defenses, search the city, learn some plausible incredible secret, and get to go home and be smug about being the only ones who know, and never realize how obviously they were being manipulated."
"For the rest of that, sure, that's all very reasonable if it's free. Do you also - just eat cookies, 'cookies', because they're tasty and not consider that you might have to pay for them?"