My youngest, 2.5-ish, is successfully using the toilet, and generally accident free. He has been at this level for a couple of months, and I would like him to start moving from the little "potty", to the toilet, for various reasons. He is in preschool, and uses a regular, though child-size, toilet. At home, he uses his "potty", which he really likes. Only when it is unavailable (someone is in the bathroom where it lives) does he use the portable seat on the regular sized toilet.
Other than some basics (we have a seat cover for him, stool that lets him climb on easily, etc.), what are some successful strategies to encourage use of the actual toilet? I am against bribing and rewards, and want to know what long-term strategies anyone has found to be useful in generating interest or alleviating fear of this transition.