Very cheap small CNC machine. You can engrav with it PCB's, wood or soft metal. It's nice to start with. You can also mill soft wood and plastic but at not so high speed. You can buy it here:
http://www.gearbest.com/3d-printers--3d-printer-kits/pp_356128.html?wid=21&lkid=10239377
and here is an assembly instruction:
