Re: It is fun ... Ving
Yes, although the whole sentence is rather unnatural and had clearly been constructed just to ask a test question. More naturally, while retaining the construction at the beginning, we would say:
Originally Posted by sitifan
For my brother, playing computer games is fun.
However, even more naturally, we would say:
My brother finds playing computer games fun.
My brother enjoys playing computer games.
Remember that test questions are frequently constructed merely to test a particular grammar concept, with absolutely no regard to whether the sentence would be likely to be uttered by a native speaker.
Remember - correct capitalisation, punctuation and spacing make posts much easier to read.