Use old CD's to make money?

Back in the old days when I was doing my research on home based online business opportunities, I stumbled upon a advertising plan. I will not go into this in detail but the idea was to contact local employers and sell them space on a advertisement card shaped like a phone box which would be kept by the home or business owner beside their phone. I thought this would be a good idea and started canvasing. After 2 weeks I had no sign ups and gave it up to try out a new project. But that is not the end of the story. A week later I was in my lawyers office when she went to make a call and pulled out the very same phone box card full of advertisements. Someone had made it work. Lesson learned.
With this in mind I want to tell you about an idea I came across but have never acted on it. This person collects old CD's and fits a Quartz clock mechanism to the back and clock hands to the front.They cost about £1.50 each to make. This takes all of 2 minutes to do. He aims for CD's with song titles that would mirror a special occasion for example: Happy Birthday,The anniversary Song etc. He then sells them for £5. Not a bad wee profit eh? You could do this offline or online as a home based business. Speak to you soon.