I don't know how your kids are, if you have any, or how you are (because you might be a picky eater, too), but mine won't touch anything of the green vegetable variety of food. Or any other color for that matter. So I found a great recipe for a healthy green spinach smoothie here.
I wasn't sure how it would go over, or if they (meaning Riley) would even try it, but they did and they loved it! And I decided that for our purposes, they would be called Tree Star Smoothies - my kids are hooked on the Land Before Time movies. They have no idea there is spinach in it, and I have issued a gag order for Dave and Caeley. They cannot know there is spinach in there until they are like 20.
So, the moral of this story is, if you or a child you know are picky and lacking balanced nutrition, then try this! One caveat, if you don't like bananas you might not dig it. Otherwise, give it a try!