Sitting back on the bench, Luna began to sand the piece of would with a quiet sort of concentration. She was a typical Ravenclaw, really, for all that she might not seem like it--she enjoyed acquiring new knowledge and skill, however simple, and she liked to concentrate on doing them well.
Besides, there was something very soothing about running the sandpaper and back and forth over the wood, actually. Something nice about using a rough thing to make something smooth.
So, for a long while, she just sat there and sanded, kicking her legs back and forth beneath her in rhythm with the sanding.