I have been working to trying to add more beans to my diet.....here's some recipes I've tried (and liked) so far!
One of the easiest beans to incorporate into your diet is lentils. They are much easier to cook than regular beans because you don't need to do the whole soaking/boiling forever thing. Plus, they don't taste quite so "beany." One of my favorite lentil recipes is this one (I do it on the stovetop and cut the oil in half) recipes.sparkpeople.com/recipe-detail.asp?
If you really, really hate the taste of beans, then red lentils are the way to go. They are a really great addition to things like soups and pasta sauce. There are a million red lentil soup recipes, most of them Middle-Eastern. I really like this Turkish version (though it is a little spicy) cmes.hmdc.harvard.edu/research/ecmes/photo
I made veggie burgers from red lentils the other day, and they turned out pretty yummy. (This one might be a little too much for kids, though...) recipes.sparkpeople.com/recipe-detail.asp?
I don't have any recipes off the top of my head, but stuffed peppers are a pretty good way to throw in some beans.
Finally, Mexican food tends to be pretty kid friendly. Adding black beans/low fat refried beans to burritos, enchiladas, and tortilla casseroles is always good. You can make it a fun create-your-own-burrito night!