In the potty- where it belongs! He sat for about 10 mins. tonight before the bath, and we read some books. Then he was playing with the rinse cup from the tub and I thought he dumped some water on his lap, but when he got up there was a bunch of liquid in the potty. It's hard to tell, because our potty is yellow inside haha. I gave it a whiff, and sure enough, it was pee!
So we dumped it in the big toilet and he flushed it 3 times lol. I gave him an M&M and he was pretty happy about that.