summer project for my classroom

This is something I've wanted to make for a long time. Isn't it so sad when you have to throw away a ruined brush? I am constantly getting on to my students about washing their brushes. They do a pretty good job but I am always left with some dead brushes. To prove my point and to recycle the brushes, I've made this ruined brushes painting/collage. The saddest part is that I still have leftover ruined brushes that wouldn't fit! I guess I should have bought a bigger canvas! 

Rest in peace, good paintbrushes!