Hardware KitThe simplest way is to purchase our Hardware Kit. It is a Complete Kit for our Marble Machines. It will come in handy if you do not want to source the parts yourself. While we ship the critical parts, you will 3D print the rest of the product. The kits fit on all of our designs and you need one kit per marble machine.All our components are plug and play - no electronics knowledge or soldering needed!Source It YourselfIf you want to source hardware by yourself then here is a list for ONE marble machine. It is highly recommended to have a soldering kit and the knowledge to solder wires. Links are for Aliexpress, however you should search and buy locally to get it faster.50x  7.144mm (9/32”) Stainless steel ball bearings (If you cannot find them locally, 7mm size should work also)1x Motor N20 3V 15-20RPM (read here if you can't find this exact motor locally)2x AA 1.5V battery1x AA battery holderSuper glue or Hot glue1x 12mm metal Locking/Latching switcha few (15 in total for all marble machines)  M3x16 bolts  and  M3 Hex NutsDupont male to female 20cm wires (or use any small gauge wire that you already have at home)