He's starting to teethe, so I'm sure the vibrations feel good against his gums. It sure does make him smile, though.
He's started getting into the Smule Magic Piano and Morphwiz on the iPad. I need to record some of it and play along.
Oh, as promised--Here's a crappy indoor picture of the BillyBass with the black ice pickguard from Magnus. More fake screws. I was a little surprised by just how much I like it. Better outdoor shots when possible. The bass is now wearing EB flats. I put the half-rounds on my mute equipped white Bongo.