YOU SAID:

my grandpa and grandma were fooling around on the bingo cards

INTO JAPANESE

おじいちゃんとおばあちゃんはビンゴカードでふざけていた

BACK INTO ENGLISH

Grandma and grandpa were playing around with bingo cards.

INTO JAPANESE

おじいちゃんとおばあちゃんはビンゴカードで遊んでいた。

BACK INTO ENGLISH

Grandpa and grandma were playing bingo cards.

INTO JAPANESE

おじいちゃんとおばあちゃんはビンゴカードをしていました。

BACK INTO ENGLISH

Grandpa and Grandma were playing bingo cards.

INTO JAPANESE

おじいちゃんとおばあちゃんはビンゴカードで遊んでいた。

BACK INTO ENGLISH

Grandma and grandpa were playing bingo cards.

INTO JAPANESE

おじいちゃんとおばあちゃんはビンゴカードで遊んでいた。

BACK INTO ENGLISH

Grandma and grandpa were playing bingo cards.