I used to know when Maya was hungry because she would suck ferociously on her hands. Then about a month ago sucking on her hands became more about comfort and exploration.
I have watched her fervently try to put both hands in her mouth at the same time and get frustrated because she ends up with none in her mouth as a result. She also keeps putting a hand so far down her throat that she ends up dry reaching (after the first couple of goes I thought she would have learnt to stop doing that but alas no). And in the last couple of weeks she has opened up a whole new world to herself - she has started reaching for things and grasping them and putting them in her mouth too!