Oh! Um... [ She pauses to look upward, hands up close to her chest, starting with the obvious. ]
I...
Play...
Guitar! [ The latter is easy; just basically strumming an air guitar twice. She giggles, looking at him before doing it again, quicker, and adding a bit extra. ] I play guitar, too!
Or, really, I just mess around with them. Bowie always left his laying around the barracks back home, so I'd get bored and pick at it when he wasn't busy with it.