D. - it's obvious you are a very caring and wonderful Aunt. Please bear with this long response - there is no other way to describe the toilet training process we used:
I had written in about 2 months ago regarding our 3 1/2 year old son who had no interest in using the toilet. My husband and I were at our wits end, as we tried all the tricks the experts write about, but nothing seemed to work. We began to feel and act negative about the whole thing and this only made things worse with our son. When we were pushy - he just pushed back even more.
I decided to write in to Mamasource, and received so many suggestions - that when reviewing all the fabulous ideas, I realized we never tried a "combination" of various ideas. So this is what we did - we turned the entire process into a game - with challenge and rewards. The rewards were Disney's "Cars" - which is something he's really into now. Our son was pretty much day trained in 3 days with this process - with an accident here and there (which is to be expected. Here's what we did:
1) Piled up a stack of "cool" new underwear in a pile on his bathroom counter so he could see them easily and choose which pair he wanted to wear each day. Of course this included "Cars" underwear too!
2) Took him out of the day pull-up COLD TURKEY (we told him we were out of them).
3) Re-introduced his first potty we tried (the low/portable on the floor training potty) and put it back in his bathroom. Note: We had been using the training rim that simply fits on top of the regular toilet seat - turns out this was part of his problem. He immediately liked the smaller potty/lower to the floor.
4) Put a small dish of M&M's on top of the fridge - and made it clear this was going to be part of the game. He would get 1 M&M for pee pee, 2 for poop each time.
4) I made several charts with six empty boxes on each, with a sticker/picture of the Disney Car he'd win at the top of each chart. This would be the car he would "win" every time he fills in all 6 boxes with "cars" stickers. He'd get a sticker to place within each empty box every time he used his potty.
5) This was the biggest thing of all. We gave him COMPLETE CONTROL over the game - we never made an issue if he had an accident. We'd just sweetly and casually tell him to go change his underwear in the bathroom. If he didn't want to play the game for a while - then we didn't push him. We NEVER asked him or bugged him if he had to go potty. We left it up to him to decide to go, or not. We simply told him about the game, reminded him of his potential prize - gave him access to his own underwear, and provided him with a new hamper placed right next to his potty - to put his soiled underwear/clothes in - in case he had an accident.
This small boy of ours seemed to change literally overnight with this challenge - this was exactly what he needed. To be in control of the situation - and have a challenge placed in front of him - plus the rewards were items he was very excited about.
In about two weeks - he didn't care about the M&M's nor cars anymore - he was simply potty trained. He was now in the habit of using his potty - and now he asks for "privacy" when he's going poop!
Our next step is to take him out of the night pull-up - which he tells us he's ready to do...we just need to have a few nights where we don't have to get up too early since there will/may be some bed wetting in the middle of the night.
Also - he said he's thinking about using "our" big potty soon, instead of his little potty.
Our life is so much easier now. Please let me know if you have any questions on this crazy process of ours. I know it sounds time consuming - but it wasn't. The simple trick was making a game out of it, telling him the rules of the game, give him the tools, and then just letting him drive the process. Three days - I still can't believe it.