My 4 year old sometimes asks for double portions of breakfast.
My wife and I are split on whether to give it to him.
It is a healthy cereal.
My child has one adult portion of cereal before asking for another.
When my wife has given him a second he does eat it.
I'm of the opinion that one adult portion should be enough for him. Anything else is greed and to be honest I'm not sure if it is healthy for him to have so much.