YOU SAID:
kangaroos are at the party throwing hands
INTO JAPANESE
カンガルーは手を投げるパーティーにいます
BACK INTO ENGLISH
Kangaroo is at a throwing party
INTO JAPANESE
カンガルーは投げパーティーにいます
BACK INTO ENGLISH
Kangaroo is at a throwing party
That didn't even make that much sense in English.