Lessons in Rotational Symmetry

I'm going through my old mail from when I was busy teaching and had no time for LEGO.  Ironically, my friend Susan (LegoMyMamma) sent me a link to a website that talks about how a teacher used LEGO mosaics to help teach her students about rotational symmetry.  Let's see.... a teacher who likes LEGO mosaics and rotational symmetry.  Yes.  That would be something I would definitely be interested in.  Anyway, here is the link to the write-up about it.  If you're anything like me, you might be interested in it too!