There are many common paths to citizenship. Some are easier than others. See the following below:
Spouse of a U.S. citizen
Family Members in the Military
Children of Citizens/Permanent Residents
Older Residents
Unaccompanied & Undocumented Minors
For minors of undocumented parents, there is a way to lawful immigration status.
These minors must...
If they meet all of these requirements, then they should fill out the N-600 form instead of the N-400 and follow the instructions detailed inthe Naturalization: Path To Citizenship tab.