That was a very nice final episode for this cour. I'm sure the writers have a lot of material to work with if they want to make another one, should Gainax be up for it, but the matter at hand is the aired episode. The first segment really made the dream sequence feel dreamlike, and gave us a nice theoretical look again at Anzu, Koume and Hiiragi's adult selves. The second half made nice use of another song by Erino Hazuki ("Yasashii Hidamari"), and ended in a cute way. More fairy tales could use robots. The closing song ("Sekai de Ichiban", by Anzu and Sakura) was nice as well.
Overall, Starchild provided two winners this season. Fun character interaction, some nice comedy, a completely new ending song every week with new and varied animation (bravo on that, by the way) and lots of heartwarming moments. I'll be remembering this one for a long time.