Next to eating, I think this is Cael's favorite thing to do... He's figured out that the cup I give him to play with is for more than just drinking bathwater (yuk). Filling it and dumping it over the side is great fun as well. Not an issue if it's dumped into the adjacent sink. However, a nine-month old cares little of which direction the water goes to disappear. Hence, the puddle at my feet as I bathe him.