I think many elementary PE teacher's would agree, teaching kindergarten has it's challenges. Students this young are in the early stages of learning social skills, understanding their bodies, and developing communication skills. Playing music can help these developing skills and really get the kids movin' and groovin'! They (we), find the music to be motivating, fun, and encouraging.
My favorite songs to play are the ones where students have to listen to directions as they move.
Here is an example: