YOU SAID:

oh how fun it is to ride the one

INTO JAPANESE

おお、それが乗ることがどれほど楽しいか

BACK INTO ENGLISH

Oh, how fun it is to ride

INTO JAPANESE

ああ、乗るのはなんて楽しいの？

BACK INTO ENGLISH

Oh, how fun is it to ride?

INTO JAPANESE

ああ、乗るのはどんなに楽しいですか？

BACK INTO ENGLISH

Oh, how fun is it to ride?