have you had better luck with the potty chairs, or the the little seat that sits on a toilet?
i got wolverine one of the little seats for the toilet. i started sitting her on it this weekend (she's only 15 mo and just started walking - i'm not expecting her to *use* it, just get used to/comfortable with the idea - the whole - "look, mommy pees in the potty, now wolverine "pees" in the potty" before we go out)
i was thinking the seat may be easier to adjust to a *big* toilet when we're out, and i also wouldn't have to keep cleaning out a potty.