Hobby tunnelin is the act o howkin tunnels as a divorsion. Hobby tunnellers offins dissent use muckle graithin an the tunnels is bigged wi just han tuils. It can tyek mony ear te howk a hyel tunnel. The biggin on't is whiles duin i secrecy an the tunnels is nobbut lyeter fund bi chance.
A nummer o foaks hes howked tunnels as a hobby. Hooanivor, some hes hed other ettles te de'd, sic as for therapeutic porposes or as a mack ov exercise.