Ich bin 12 (zwölf) Jahre alt.
or simply: Ich bin 12 (zwölf).
age = alter
age-defying translates as Alterstrotzend although the German cosmetics industry tends to just use the term "age-defying" without translating it.
He is smart for his age = Er ist klug für sein Alter.
zwölf weitere Tage
I say 12 or 13
You just say you have so many years. J'ai douze ans. I have 12 years. I am 12 years old.
Alle zwei wochen Pronounced: OLL-UH SVY VO-KIN
To say body in German it is Körper
How do you say "War" In german? Answer: "Krieg"
Tranianieren is how you say practice in German.
How do i say i have a brother and a sister in German ?
I would say that when a kid is ready to kiss then they should be able to. But I would say that 12 and older would be the more appropriate age.