You say, "Tienen doce años."
doce
12 in Spanish is "doce" pronounced like "dos-eh"doce (doh-say)
doce y doce de la tarde
You would say son las doce quince
Doce (dough-say).
I am 12 years old and my birthday is July 28.
Tengo doce.
Tengo ocho años.
To answer, Cuantos anos tienes?( How old are you?) You say: Tengo __ anos. Filling in the blank with your age.
Tenho 25 anos. or Tenho 25 anos de idade.
Docinho, Meu Doce
Translation: Doce