Practice both ends of a guitar without carrying either

Practice picking with Twanger (via), and fingering with Little Fretty (via).

Both thanks to Gary, of course. Kind of cute, but the Twanger is a bit on the expensive side, and Little Fretty could make for a bit of a bulge in your pocket.

Sam sez “The secret of Robert Plant’s trouser bulge – revealed!” (figured it’s better to edit rather than comment. Slap me if I’m wrong.)