Repairing some trains

[Ucwepn]

I would get some pliers with a rubber band on the handle (for holding things while gluing or soldering), a soldering iron + solder, a decent quality screwdriver set which may include a triangle screwdriver as mentioned above (you will need it), Some lithium grease (for gearboxes), and some bearing lube (for dry squealing motors). A battery holder soldered to a pair of alligator clips is also a useful tool for diagnosing where problems are.