YOU SAID:
When you're a kid, you don't realize you're also watching your mom and dad grow up
INTO JAPANESE
あなたが子供の頃、あなたは自分のお母さんとお父さんが成長しているのを見ていることに気づいていない
BACK INTO ENGLISH
When you are a child, you are not aware that you are watching your mom and dad grow
INTO JAPANESE
あなたが子供であるとき、あなたはあなたがあなたのお母さんとお父さんが成長するのを見ていることに気付いていません
BACK INTO ENGLISH
When you are a child, you are not aware that you are watching your mom and dad grow
That didn't even make that much sense in English.