Report Abuse. There is no age restriction but pet shop owners are usually very responsible people and will not sell a puppy or a kitten or anything else to an unaccompanied child.
When the price goes up, naturalization rates go down. The current filing fee for Form N-400, the Application for Naturalization, with U.S. Citizenship and Immigration Services, for adult applicants is $680 ($595 plus an $85 biometric fee). This is certainly a prohibitive cost for individuals living below the poverty level.
Cost Not to Become a U.S. Citizen. How much does it cost not to become a U.S. citizen? CitizenPath created a Citizenship Cost Calculator that compares the costs of becoming a U.S. citizen with the cost of remaining a permanent resident. USCIS requires permanent residents to renew green cards every 10 years at a cost of $540 for each occurrence.