Based on my experience with instruments and my habit of loving random sounds that are a break from my traditional music taste, my other main idea was to create some form of band performance using scrap materials, forming instruments such as the didley bow! The video, featuring Jack White below shows how a simple instrument (The didley bow) and he’s right, who needs to buy a guitar!
Building from this, using another combination of glass bottles, beer cans, planks of wood, well pretty much anything I can lay my hands on that can produce an interesting and loud sound, I would create rough versions of other recognizable instruments and record their sounds, and either create manually or perform a composed song. The main catch with this idea is that the sounds have to be constructed properly so that the performance actually sounds like a composed song rather than pointless noise!