dreaded potty training

we've tentatively begun potty training again, although not seriously. we tried it for about a day & a half, but it hasn't really done much good. i don't think he understands the feeling of needing to go quite yet. at first m&m's worked as an incentive to sit on the potty (because before, he absolutely refused), but then he didn't care about them. in the past couple of days he's earned a few m&m's - he has to produce pee or poop in the potty in order to earn them. a friend recommended watching this video - http://www.youtube.com/watch?v=_6-KrrIbAEs

and it rekindled his interest in sitting on the potty, but now he wants to watch it all the time while sitting on the potty. we're getting a little tired of the song, but if it works, it works. j & z are going camping this weekend just for tonight, so no potty training there. they'll be stopping at timberline lodge to do some sledding on their way to smith rock. if it goes well, we'll try camping at paulina lake on july 4th weekend.