YOU SAID:
messing about in a boat on a river
INTO JAPANESE
川のボートでいじります
BACK INTO ENGLISH
Play with the river boat
INTO JAPANESE
川船で遊ぶ
BACK INTO ENGLISH
Play on a riverboat
INTO JAPANESE
川船で遊ぶ
BACK INTO ENGLISH
Play on a riverboat
That didn't even make that much sense in English.