I opted for a photograph I took last christmas of a little vignette I created. For me SPARKLE is associated with light of some kind. It is a joyful, fun word that brings happiness. Sparkle can create moods anywhere from frothy to drama.
So now that I've said all that I just realized the prompt word is Twinkle. I think my santa covers both words. He sparkles in the mini lights which make his little jewels twinkle :)