YOU SAID:

i did not not not not eat the child

INTO JAPANESE

私は子供を食べませんでした

BACK INTO ENGLISH

i didn't eat the kid

INTO JAPANESE

私はその子を食べませんでした

BACK INTO ENGLISH

i didn't eat the baby

INTO JAPANESE

私は赤ちゃんを食べませんでした

BACK INTO ENGLISH

i didn't eat the baby