How can I make my child interested in playing chess? I am just an OK player and I wish for my eight-year old kid to learn chess and be interested in it too. Can you please give tips/ideas as to how can I make my child interested in it?
In my experience it is likely that kids get interested in whatever you are interested in.  So, play a couple of chess games with a friend or set up some chess problems and work on them yourself at a time where your kid can see what you are doing.  It is quite likely that your kid will start asking questions what you are doing and wants to play as well.

Whenever my sons sees me setting up the chess board he wants to play... unfortunately he is not even three years old, so besides learning the names of the pieces there is not much he can do yet. ;)