The Kapilow pieces were not what I would have expected--quite modern, musically (especially Green Eggs), with a mezzo-soprano soloist role in both that seemed challenging. The other player in Green Eggs was an eighth-grade boy (playing Sam I Am) who had mostly spoken lines, with just a little singing at the end.
Gertrude McFuzz was fun, and not quite so modern in the harmonies. The mezzo had a narrator role, and the other player, a woman, was Gertrude McFuzz, a bird who is unhappy with her tail feather. The piece was a good demonstration of why this concert series does so well with its conductor, Jere Flint--when Gertrude goes to ask her uncle for help with the tail feather problem, Mr. Flint, conducting away, served as an uncle-prop, having his coattails tugged, his legs hugged, and so on. And it got worse--Gertrude is sent to find a pill-berry vine to eat a berry. The narrator picks up a cylinder about 18" high and adorned with leaves, and plops this on Mr. Flint's head--he's now the pill-berry vine. The kids love it, of course.