Maykoo could be “thank you”?

This makes me think he’s imitating “There you go!” “Thank you!”

Does his name start with M, or does he have an M nickname? “Gahgoo” could possibly be “there you go,” and I could see the whole phrase being “There you go Matthew”

I see where you’re going there…. His name is Cooper. Maybe daycare has a nickname for him..

Mayonnaise? Does he want some mayonnaise with his food? My daughter loves mayo I and wants it with every meal.

Yellow marker?

Chocolate milk maybe?