Hi
There's been lots of suggestions on this thread about music and movement. There are lots of free chants, songs and games for primary kids on
http://www.pamseslclassroom.com
I just added some song packages that enable you to download the mp3 as well as the lesson plan, flashcards and worksheets in pdf format. I am putting more up all the time and hope these help you.
Also there are free downloads and lots of lyrics for songs suitable for the primary kids you have.
Good luck