I almost forgot to post this! Lordy, me!
Friday night when Alex got undressed to take his bath, he sat down on the potty and actually went potty!!! Of course, most of it ended up on the floor in front of the potty because he doesn't quite understand the point down part, but he figured it out and managed to get at least some in the potty. I'm not going to push it, but am very excited that he thought about it!!!