Rainstick Craft for Kids (and Science Activity)- Explore sound with a homemade instrument! ~ BuggyandBuddy.com
Musical Truth or Dare Flashcards - naming/playing keys, notes, sharps/flats, etc. - cards available for 3 levels
Sing or Dare: "Sing" cards like "sing [the song] while marching the beat" or "sing the song, but buzz all the words 'the'." "Dare" cards like "Name everyone in the room" or "Hug the teacher." (I think I might change the dares to musical things like "sightread a simple song" or "play the song on the xylophone."... Great for a positive reward!