Mommy sit, Where are You?

Logan has been telling me to sit now, he will say "Mommy sit". It is neat to see him expanding in his communication. I am trying to get him to add the please on the end of that sentence. He usually is pretty good with his please and thank you's though.

He says "where R oooo?" a lot (as in where are you?), it is funny. He will be right in front of me and go, "Mommy, where R oooo?"