I recently heard about these crayons Crayola makes for writing on glass and in the process of finding a local vendor for them I learned about bath tub crayons. Of course, when I went to Office Depot all they had were the window crayons. I figured they'd be just as good in the shower, right? Not so. While the tracing of my own face I did on the mirror before I turned on the water survived, the drawings I did on the bathroom tile *during* the shower melted real quick. Ah well. Anyone know where I can find bath tub crayons?