It could be fun to watch them.

看他们会是乐趣。

《柯林斯英汉双解大词典》

But it will still be fun to watch.

但是看看还是很有趣的。

youdao

This kind of robots will also be fun to watch.

这种机器人也将是观看的乐趣。

youdao

So I would say, even though basketball can be somewhat fun to watch on a big screen.

所以我说，尽管在大屏幕上看篮球比赛也有它的乐趣，（现场看更好）。

现场观看篮球赛 - SpeakingMax英语口语达人

It may not make for a very edifying election campaign, but it should certainly be fun to watch.

ECONOMIST: Political advertising

It can be fun to watch people backpedal sometimes.

FORBES: 'The Witcher 3' May Not Be The End Of The Franchise After All

For consumers, there is the prospect of more choice and lower prices, for the phone-makers an increasingly desperate fight to claim their share of the cake. it will be fun to watch.

BBC: Samsung, Apple, Nokia and the smartphone dogfight