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.
On average, the price for becoming an American citizen is about $725 for just the filing fee for Form N-400. This is going to include a filing fee and the fingerprinting/background check (biometric service) fee. If you were to a need an immigration lawyer, though, the costs could soar into the $5,000 to $10,000 range.