By the way,

来源: 于 2012-12-29 13:43:10 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

the child needs to have a copy of the mother's green card or the copy of the mother's endorsed immigration visa (green card stamp) from the mother's passport to enter US if the child enters US individiually.