This is first block of rosin I bought as an adult:

Rosin, for the uninitiated, is the stuff that string players rub on their bow hair to help it grip the strings. See how it gleams. Isn’t it lovely? The sight of it, like the familiar smell of my viola when I first reopened the case, brought back so many memories. I get a great deal of satisfaction from flicking open the metal claps of my case, pushing back the lid, grabbing my viola by the neck, attaching my shoulder rest, tightening my bow, and finally, putting some rosin on. There is so much pleasure in these little rituals.