This is a front attachment fish-eye. It's not able to form an image on its own, but rather relies on the main lens for that. It does not have autofocus, but the kit lens has.
My advice is to avoid attaching anything heavier than a filter on the front of the kit zoom ( I understand you have Olympus kit zoom) in order not to damage the internal AF gear.
About adapters - you will supposedly have no problems with Canon FD adapters. Get one which closes the diafragm with a twist of a ring on the adapter itself, as it will be of better use later on, when you deside you want to shoot with the legacy lens stopped down.

Sony has got clever here....
For their 16mm NEX lens, Sony will sell two small attachments, one being a fish-eye, the other a wide angle...

Thank you adash, that makes a lot of sense. I actually didn't intend to use autofocus, I just mentioned it because if it had been an actual lens, that would be quite cheap and with autofocus at that! Now that I know that it is an adapter, I rather not have that hanging from my poor baby lens. Thanks all.