M.M.
I used pullups until they kept them dry for a bit. I would also praise them when they did wake up dry. There will be accidents in the beginning, but they will learn fast. With my 3 year old, we had potty trained at about 2, and have just recently had the talk with her about not wearing her pullup at night. She was so excited about being a big girl, and I just wake her to go to the bathroom before I go to sleep. Now we are pullup free!! Good luck to you!