an interestingly different idea but i would have loved a bit of an explanation about the why and how this all works and is happening. 

why does everyone have sand in there mouths? how do you make a baby not swallow that while drinking? how did it came to be and for what reason? when is this story set? 

i liked the writing and as i said the idea is great but the story is one that you just have to take as it comes without trying to think or it all is very confusing