I think I have mentioned this before, but I cannot emphasize enough how camera conscious or rather not conscious (take your pick) my daughter is. The minute the camera is out, she stops doing whatever she is, and flashes a big grin (nowadays with her mouth wide open too). She then loves checking herself out in the camera preview option and let's not even get to the point when the pictures are uploaded to the laptop - it's sheer joy to see oneself, apparently.
The other fascination that she has always had is with light and light sources - even as a baby, a switched on bulb was enough to catch her intention. Then much as she hates the sun in her eyes, she likes how the stray rays enter the room at various times of the day and the funnies part - she open her mouth so that the rays fall into her mouth. Remember dhoop from Koi Mil Gaya? Anyways, given her appetite, I guess "dhoop" might be her sustaining source!