I agree with jemjem.
Wait until your child walks. He will become more less interested. That's true since they want
to explore more and just don't want to sit and be on a certain place at a time.
So I think lessen your lessons and look for his mood. Sometimes they are not just in the mood
to have lessons. But everyday is not always like that. There are times that they are very
receptive.
So just be patient. We have been into that too.