Feasibility Question and Advice on CAD software
Using metal Christmas tree tinsel used to be common for this sort of thing in physics labs; then photo gates got cheap, tinsel feel out of favor as a decoration, and modern varieties may not be conductive anymore anyway. 

For a disposable item like this, you might want to investigate some sort of carbon-based conductive printing rather than a metal circuit board process or silver-based conductive ink which costs a small fortune.  You don't need anything nearly as conductive as a normal circuit board, as you only need to detect if the connection is still intact or not.