I decided to learn Japanese just for fun.

我决定学日语只是为了好玩。

《牛津词典》

I decided to learn Spanish, just for fun.

我决定学习西班牙语，只是为了消遣。

《牛津词典》

They aren't coming here for fun.

他们不是为了好玩而来这里的。

youdao

Musicians from all over Kansas City would play for fun during these unplanned performances.

VOA: special.2009.05.03

- I would say that this is more of a-- more for fun than perhaps as enlightening as the pure visualizations where that we looked at last time.

我觉得这更加-,比我们上次看的演示,更加有趣。

哈佛公开课 - 计算机科学课程节选

But it's really good. I'll probably keep doing Open Course Ware stuff like, for fun,

但是这很好。我可能会一直为了好玩上公开课，

开放式的课程？ - SpeakingMax英语口语达人

For fun I write best-selling novels under assumed names like Carl Hiassen and John Grisham.

FORBES: Roll Your Own Berkshire

Just for fun, Gray recently created a program that uses Twitter to read poetry.

FORBES: Breaking Up (Or Not) With The Help Of A Mobile App

Mr. Smith says the project was meant for fun anyway, not to make money.

WSJ: 'Great Gatsby' the Videogame: Daisy Meets Mario Bros.