One day a student came up to me with a Crayola watercolor pencil, telling me there was something wrong with it. It looked fine to me until the student pointed out the labeled color. It says blue... but this is clearly a red colored pencil! Have you ever seen something like this? The only stranger thing I've seen with art supplies was the time I took a brand new Ticonderoga pencil out of the box to sharpen, only to find that the graphite was missing! It was just the wood shaft with a hollow center!
What's the strangest thing you've found with your art supplies?