the method i use for repairing tracks in sound/lighting desks applies here ..very simple . the tracks usually have a thin plastic coating over them so you cant accidently touch them .what to do is scrape the coating off before the break(very gently) untill you see the copper track underneath and solder on (again gently with a good soldering Iron) a piece of wire (the stuff i use is solid core and very very thin) do the same again after the break and voila repaired track
dont do it if your not comfortable with a soldering bolt.
ask a responsible adult and never run with scissors