Strong Mason

For quite sometime now you can ask Mason, "Where's strong Mason?" and he'll flex and say 'grrrrrr' like he's a muscle man.
Funny thing that when I take Mason to school in the mornings he wants to be carried in instead of walking in (like he used to!) and every morning our conversation goes like this,
"Don't you want to walk like a big boy?"
he replies with "NO. I carry you."
I always laugh and say, "I don't think you're quite strong enough for that yet."
"I strong Mason!" (and he flexes.)

wonder when the confusion of i/me/you/we/us will work out!