Getting the kids to eat healthy..Yikes

Here is a project that I had fun with, trying to get my kids to eat healthy, you are either laughing at me thinking this can not be done or you just don't care because you think no way your child would even attempt to try a veggie. My kids are still young, the twins are almost 6 and my youngest which is almost 4 and they all hate healthy stuff. We sat down and I said, we are going to try to have something healthy and in return, you can have whatever you want for dinner one night a week, deal? This went on for a couple of months and now they do not even crave the junk anymore, well not as much and the healthy foods, is just food. I still have to occasionally make it look desirable, and of course flavorful but each week we try something.