I'm with Katherine, Brent! I really love this polor bear ball. The scratches in it are neat and it fits the theme so well too! Also, to me the water has the look of a glass Marble and the "marble" the look of concrete. See what I mean?
You think its some kind of really dense styrofoam? That's all I can think of. Hummmm, trouble is you have some really nice ones in competition too. I do really like this though!