Puzzles & Potty Training?

For the past two weeks Caleb has been wanting to go to Classy Castle every day. There are two reasons for this. One is that they got some new puzzles that Caleb loved to do. The second is his two new best friends - Cooper and Trey (twin brothers). They are new to Classy Castle and Caleb talks about them nonstop. The other morning when I dropped the boys off I found out why. They are into Thomas the train too and had even brought a movie in with them. Needless to say, Caleb can not go there every day. They only go once or twice a week.

So, yesterday we were in Shopko when we discovered a pack of 4 of the style of puzzles (25 piece with a border around them) that Caleb has been enjoying so much. Caleb was quite excited about this. When we were on our way home I got an idea (not like I haven't tried bribery in the area of potty training before), and told Caleb he couldn't have a puzzle until he went potty. He did this promptly when we got home and got his first puzzle. Once he completed that one he wanted the next one. I explained to him that if he wanted another puzzle he had to go potty again. He did and got the next puzzle. I told him he could have one puzzle at a time and that we would switch puzzles each time he went potty. We are doing this in combination with the Thomas underwear today. He has had one accident so far, but we are still making progress nonetheless. I hope it continues. We have been trying for some time without success so hopefully this time it will stick. He is taking a nap right now and I will see if he makes it through dry.