We JUST went to Dr. Lee for the 1st time Tuesday, and my DS who is also 4 had his first appointment too. He is not nursing, so I can't comment to that, but he had a GREAT experience. My DH and I also had appointments the same time, and while my DH watched my DD in the waiting room, DS came back with me. After watching for a while, he HAPPILY went off with the hygienist for her to look into his mouth, as well as Dr. Lee. He did so well, that they went ahead and cleaned his teeth. When I was done, I went back with him, but he totally didn't need me
And this is a kid who had oral aversions and we have quite the struggle at home to brush his teeth. They were great with him.
And while I had my cleaning, my DH was in his appointment, so my 22 month old DD sat on my legs while they cleaned my teeth.
While we were waiting for DH to be done, the receptionist came out and played with DS for like, 20-30 minutes. There were toys in the waiting room, including a wooden horse barn with horses, and they didn't seem to mind when both kids messed with non-toy things. The hygienist makes the "happy visit" fun, with a "roller coaster" chair, and other child-friendly names for the equipment. They also get to pick a "treasure" afterwards-yes, it's a cheap plastic toy, but in exchange for the great 1st visit we had, it was well worth it to deal with it for the short time it will be around before it's lost or broken.