Fredrick W Voigtmann
Immigration AttorneySince your condition has been removed, you can surrender your green card without affecting the green cards of your dependents. You should surrender the green card, i.e., execute form I-407, not at the U.S. airport departing the country, but rather at the U.S. embassy or consulate in your home country in conjunction with an application for a B-1/B-2 visitor visa. Once your son becomes a U.S. citizen (assuming he is over 21), he can petition for you to become a U.S. permanent resident again, if you so desire.