You could prep him with decoding games, have him invent a code for you to decode and visa versa. That was a hit when I was a scrub. My brother and I would spend

You could prep him with decoding games, have him invent a code for you to decode and visa versa. That was a hit when I was a scrub. My brother and I would spend time insulting each other and then had to work at it to decypher the insult. It then felt like a triumph to be insulted and understand it.