'Matthew, it is Twenty and not Twenteen' - I corrected him.
'Okay Mommy, Twenty' - he corrects himself and continues to count.
... Twenty Ten
'Matthew, no it is Thirty and not Twenty Ten' - I corrected him again.
'No Mommy its Twenty Ten' - Matthew replied.
'Matthew, next is Thirty One' - I wanted him to continue.
'No Mommy, I am done counting NOW' - he replied.