I collect and draw treasures. Treasure can be anything - a leaf, an acorn, a piece of lego, a torn piece of paper, a list, a drawing, or a ticket stub. It is a treasure if someone tells you that this is a treasure and gives it to you. Or if you think it is a treasure. There are no more rules. A cloud can be a treasure also. I've been given a moon several times, for example.
I've been super lucky to have a steady supply of "treasures" to appreciate and draw for many years. I even made some calendars with treasures and taught several sketchbooking classes around the theme of treasures. Then there was a bit of a dry spell but this fall I am going back in full. Here is a little branch from an oak tree on the way to school. It is my treasure, and I am sharing it with you this way.