How much do you wanna spend? Nice toys are either an e-bow or the new 'pocket PODxt' - if that's too expensive then maybe a guitar repair/maintenance kit ('lemon oil' for the fretboard, 'roadie wrench' - has all the specialist alan keys/spanners and screw drivers, 'fast fret' for cleaning strings). I've got a load of guitars and would love if my wife got me a present of any of that stuff!