word games with a 6yr old

Z & i are in the midst of going over his homework & i escape to the kitchen for something & he walks in & says "guess this word"

Me: ok, i need a hint (way, way too many options already)

Z: just guess the letter it starts with

Me: how about another hint?

Z: it doesn't have an 'a' or a 'x' in the word (what is he, a politician? way to give a hint that doesn't help)

so i recite the alphabet randomly & get nowhere

Z: the word was 'the' i win!

i'm in for so much trouble when he takes geometry....