Many foreign-born American citizens have said they feel that their fellow U.S. citizens question their Americanness. This spurning can be particularly difficult for immigrants’ U.S.-born children: some Asian-American kids, for instance, have sought plastic surgery or blue contact lenses to give their eyes a more “American” appearance. Now comes evidence that immigrants’ kids may even eat more in an effort to fit in with U.S.-born kids, which is to say they try to be fat.