I think that they are a mixture of an egg and a beanbags... really very cute : ) Nice work! Cheers, Rex

I think that a crop of gray rice was genetically modified and then implanted with some sort of microchip and now they are tiny living rice robots and they took over New York City and shrunk down all the buildings with their shrink ray powers (because they are now super rice) and you where in New York at the time so you decided to take a picture but took it with some sort of filter so now it all looks gray... Nice job, really cute!