I don't have kids of my own, but made a salad for a dinner at my sisters using kale, collard greens, and swiss chard. I won't cook my kale. Just don't like it that way, but with a little love and persistence, you can easily wilt it and use it as lettuce.
remove the stems and chiffonade the kale (i roll it and them slice it. it comes out in pretty little ribbons), then I put some salt on it (usually use pink himalayan) and just massage the heck out of it. It will turn dark green and shrink. I add some cranberries, lemon juice and sesame seeds. Makes for an awesome salad.
I also dehydrate it so I can make kale chips.