I Recommend
/I have always loved Jumpstart Music. I used the game some when I taught public school a little bit and my own kids have enjoyed it a lot. It is a preschool/elementary school game computer game that works on musical concepts. You can adjust the level. You go through music land and complete rhythm, melody, and instrument identification games to collect points. I highly recommend it for anyone learning basic musical grammar!
Find the bad notes
Play back the correct melody