Musical Tree - "Music 'Leaves' Me Breathless" :: Have students write short sentences about how music changes/affects their lives.
50+ music activities & music theory games for kids from And Next Comes L
Music Monsters - each student grabs one on their way in the room. Take it away if they are not meeting expectations. Students who still have their monsters at the end get something special (stamp? sticker?)
Music Apps Everywhere! A great list of resources for teaching note names