It sounds like a title to a show, movie or video game (most likely a cartoon)
Translation: Barbie in a mermaid adventure or Barbie's mermaid adventure (sounds better)
"Una vela" is a candle.
"Una cuadernos" is not grammatically correct in Spanish. "Una cuaderno" would mean "a notebook" in English.
Una casa means "a house"
A girl and a rat.
The latin term "Una We Possum", means "Together We Can"!!!! Una We Possum = Together We Can
"Una semana" means ' One week'.
mandame una foto
Una mano is Spanish for 'a hand'
Una bolsa is spanish for "a bag"
It can mean "a" or "an", depending on context. It can also mean "one" describing a feminine noun. Example: Tengo una manzana. "I have an apple". Tú tienes una mesa. "You have a table". Yo tengo una. (referring to the table) "I have one".
"Una botella" means "on bottle" in English.
I guess you mean "Hagamos una peli", wich translation is "let's make a movie"