From the homeschooling family that wrote The Fallacy Detective, here is a short article about the possibility fallacy and the Moon Hoax. Even young children are amused by hoaxes and 'tricks', and by incorporating these lessons in their education, you can encourage them to think more carefully and critically.
Possibly vs. Probably - Was the Moon Landing a Hoax?
Response to Moon Hoax
NASA's Answer to the Moon Hoax