YOU SAID:
the child is holding a rattle
INTO JAPANESE
子供がガラガラを抱えています
BACK INTO ENGLISH
The child has a rattle
INTO JAPANESE
子供にはガラガラがあります
BACK INTO ENGLISH
Children have rattle
INTO JAPANESE
子供たちはガラガラを持っています
BACK INTO ENGLISH
Children have rattle
That didn't even make that much sense in English.