How to stop my child keep turning off my playstation.

I am looking for some suggestions to solve a problem with my two year old. He keeps turning off my playstation at the socket switch. I've tried telling him no and that makes it worse, I've tried putting the magazine rack in front of the socket, but when I come home from work he has found away through. Has anybody had the same problem and got some good tips from a frustrated gamer, cheers

yellowstar