As Kai likes to introduce this story: NEWSFLASH! He peed in the potty tonight for the first time!
Of course, I missed it. While the kids were doing their duty before bath time, I was tidying a few things in the kitchen. Upon my return to load him into the tub, I saw a splash of liquid in the potty's pot.
So we celebrated with much ado. I'm not sure that Kai knew what all the fuss was about; but for him, any excuse to dance and cheer is a good one.