YOU SAID:

wooow i didnt know that mean is word of a small child

INTO JAPANESE

うわー、小さな子供の言葉だなんて知りませんでした

BACK INTO ENGLISH

Wow, I didn't know it was a little kid's word

INTO JAPANESE

わあ、子供の言葉だったとは知りませんでした

BACK INTO ENGLISH

Wow, I didn't know it was a child's word

INTO JAPANESE

へー、子供の言葉だったとは知りませんでした

BACK INTO ENGLISH

Huh, I didn't know it was a child's word

INTO JAPANESE

へえ、子供の言葉だったとは知らなかった

BACK INTO ENGLISH

Huh, I didn't know it was a child's word