How can you experience Wii gameplay in Playstation2?

May be...

Is there any extra accessory?

I think the closest thing you could get is the eyetoy. Although to be honest it doesn't even compare, it's very primitave the best u'll get!



www.eyetoy.com

there are a few things:

EyeToy is something like a webcam,for PS2.

Mic/Rick Band you can sing.

Drum,guitar etc. Guitar Hero.

Then there's the Buzz controller.