i haven't done this (although it really sounds like fun!) but i thought i'd look around and see if i could find some patterns. not exactly . . . but here are a few ideas. they may not be the materials or style you were hoping for, but could be inspiration for your own design!
High quality, no. But, I did make a kitchen for my little brother when I was in high school. Plywood sides, top, shelf, and back (with supports obviously), sanded, painted with burners, of course, dials put on in the appropriate locations. He was 3 and loved it. I don't know how fancy kids need their kitches to be!