I'm trying to build a maze for a psychology final project and I want to be able to shock the rat at a push of a button for negative reinforcement. I would like it to be battery powered but its not all that importatn. I don't want to kill the rat but instead just let him feel it. What floor should I put in the maze? What do I need to attach to the floor to shock the rat at the push of a button? Where can I go to get these materials?