I went with ART school supplies. These items were my constant companions during my year of studying commercial art in Chicago back in the mid 1980s. I photographed the finished piece with the actual black plastic gear that appears in the painting. The gear is the mechanical key for twisting the nib off a Koh-i-noor Rapidograph mechanical pen (pictured at the top). I used Rapidograph pens every day in art school. I loved them!
And, for the puzzle portion of this piece: when unscrambled, the brown letters scattered around the piece spell "art school."