Build your own metal detector - Young Professor Kit.
This kit contains everything you need to build your own hand held metal detector and start treasure hunting! Also included are details of how metal detectors work. A great kit at a pocket money price!
Build your own metal detector - Young Professor Kit. 
This kit contains everything you need to build your own hand held metal detector and start treasure hunting! Also included are details of how metal detectors work. A great kit at a pocket money price!