A bathtub skirt. After some searching, I believe that is what it is called. And to think I may never have learned the name of the panel on the side of the bathtub if it hadn't been for Anthony. I wrote in my last post that he has been targeting it for some time with his tantrums, and now he has finally broken a major chunk of it completely off. The upside to this is that I finally got to see how the tub looked underneath. The downside, of course, is that now I have to figure out the best way to repair it.