Spell it out

In my ever-present attempt to make all moments little learning opportunities for my ever-growing boys, today was a good one.
Riley was "reading" to Liam what was on his paper..."TOooooo JAaaaXSON FffrrrROM RILEeeeeY"...extra slowly so that Liam for sure would understand. For some reason the next sentence ended in the word NOT and so I appropriately asked, "How would you spell NOT??" NnnnnaaaaaaahhhhTTttttttt. (That's me, sounding it out.)
"I don't know mom, but I know how to spell TV!"
"Oh, good."

Whatever. I try.