CDs are great. Find a Victor Wooten or Stanley Clarke CD perhaps. Find out what kind of music he likes. New strings are always wonderful. Or just a gift card to your local music shop. That'd be good times. I know giving a gift card can feel thoughtless, but going with him to the guitar shop would more than make up for that. Plus, it's worth it to give a musician ANY excuse to head to a guitar shop. Seriously.
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Music Gear Review - Keyboard/MIDI and Songwriting Editor/Mod
"I don't like it, and I'm sorry I ever had anything to do with it." - Erwin Schrodinger, on Quantum Physics
Keys: Nord Stage 88, Nord Lead 2, Yamaha W7
Upton Bass Custom Upright, BSX Allegro EUB, '80s Peavey T-40, MIM Active Jazz Bass, Godin BG-5, Fender Bassman 100, `68 Fender Bassman 50 head, Gallien-Krueger Fusion 550, SWR (pre-Fender) Goliath III 4x10, Markbass 2x10 Traveler