Instead of wires use tags to connect electrical components.

Name :-

PushPin-a Tangible Programming Interface Using Physical Tags for Home Automation

Concept:-

Like you use wires in your house, this system uses pins for connections, only same color of pins can make pair.

You can control the AC load with a toggle switch or slider. You can also make intermediate tags in the switch.It also has the functionality of timer delay, by which you can delay the timing of switching on the device.

Now the best part is, if you install infrared sensor in it, it can sense movement and it can be used for like if you enter room TV should automatically start. Watch this video...

~DesignInterface

(they have great projects)