We had our first piano practice meltdown tonight with DS5 (almost 6) who started learning piano a month ago. He kept crying that his hands are just two small to play correctly. He was playing Mary Had A Little Lamb with Chords. Although he knows all the notes and hand positioning it's true that his hands are still pretty small. After practicing about 10 times (with some tears) he finally was able to play it once flawlessly. He was so proud of himself. I decided to quit while ahead and told him stop practicing until tomorrow.
As far as the boring part goes I think my DS5 prefers the learning to read music and the various terms then he actually prefers playing. After one month he can sight read all the notes on the bass and treble clef and can identify all the keys on the piano. He has also learned about 30 other music terms from his flash card set. He keeps telling me that he wants to play the trumpet instead and I have explained to him that he doesn't have the lung power yet. When we talked about him starting piano I told him that it was important to learn to read music no matter what instrument he chooses to learn to play. In him mind I also think that he knows that the piano is not the instrument for him and he is only taking lessons to be ready for the trumpet.