YOU SAID:

Cause baby you're a firework

INTO JAPANESE

だって、花火をしています。

BACK INTO ENGLISH

Because they are playing with sparklers.

INTO JAPANESE

彼らは花火で遊んでいます。

BACK INTO ENGLISH

They are playing with Fireworks.

INTO JAPANESE

彼らは、花火で遊んでいます。

BACK INTO ENGLISH

They are playing with Fireworks.