Most usually, you need a passport.
Yes, if you enter by plane. If you enter by land, you only need a driver's license or birth certificate.
If you are from the US, Canada or the European Union, you don't need a visa. If you enter Mexico by land, all you need is a birth certificate or ID. Otherwise, you will need a passport.
No. If you enter Mexico by plane you need a valid passport. If you enter Mexico by land however, it will not be much of an issue; however on your way back to the US you will have to show at least an ID or birth certificate.
If you have an ID and birth certificate, you shouldn't have any problem re-entering the US.
No. To enter Mexico from the US you would need your American passport. If you don't, you would require an ID or birth certificate when traveling by land.
No, a birth certificate alone is not sufficient for entry into the US. You will need a valid passport or other approved travel document.
American citizens don't need a visa when traveling to Mexico; all you need is a passport, ID or birth certificate to return back. If you however are violating your parole, you will be arrested on your way back to the US.
No, a baby cannot travel to Canada with only a birth certificate. They would need a valid passport to enter the country.
You need an American ID, birth certificate or US passport. Note you don't need anything to cross into Mexico; however you will need any one of these documents to return to the United States.
After June 1, 2009, you will need a passport. Until then, your drivers license and original birth certificate or certified copy will suffice.
No, but if they want to come back they do. However, if accompanied by an adult who has a passport, a birth certificate should suffice.
Yes. You only need a birth certificate and or ID.