My son will be 3 in July, and although he's been sitting on the potty a few times a day for over a year, it wasn't until last week that he started showing serious interest in potty learning. He wants to be in his underwear all the time, but doesn't know to tell us when he has to go, so we've been setting his timer for every half hour (during the day) and putting him on the potty then. Most of the time he is not resistant to this, and sometimes he goes, occassionally he doesn't. If he is resistant, I offer him the option of putting on a diaper instead, but he always insists that he wants to wear underwear, and then usually agrees to sit on the potty. I'm glad to see that we are making progress in this area, however, since this all started, I have noticed some really negative behaviors coming out in my once-so-sweet child. I'm not sure if this is a coincidence b/c it didn't start until a few days after the underwear, but I have to consider that the 2 could be related. My son has never been one to throw tantrums, except when he was teething. However, for the last 4-5 days I've been dealing with boundary-testing, tantrums, and out-and-out defiance, the likes of which I've never seen from him. I'm reading "Adventures in Gentle Discipline" and doing my best to use my "tool box" of gentle discipline techniques, but I am at my wit's end most of the time. Any suggestions on whether his behavior could be connected to the potty learning and if so, what do you suggest? Thanks for any and all thoughts!