Variations for "C"

I'm backing a bowed psaltery player Sunday for a special music service. Everything is in C major. Any ideas for some variations from C,F& G chords? Again I'm backing on acoustic so it's her show.

Thanks,
Vic

As long as you get the 3 main notes in there there are many variations.

http://www.looknohands.com/chordhouse/guitar/index_rb.html