Fiddling with a cat toy or a piece of string in your dream is an omen that you are being fussy and worrying about small details. Some people think that when they dream of fiddling with something, it means that they need to make changes in their life to stay focused on bigger goals.
If you are playing a fiddle in your dream, then it may represent your musical talents. If you dream of struggling to play the fiddle, then it might mean that you have to be content with what you have and stop trying so hard.
If you are dreaming about playing a fiddle in a church or other holy place, then this may indicate that you are seeking comfort or guidance.