I would've liked this better if the narrative voice was a little less intrusive. The narrator/author tells us that this originated as an oral bedtime story for her daughter, and the style very much reflects that. It actually reminded me quite a lot of the episodic tales that my mother told me as a very small child. That made be feel warmly toward the story in general, but as an adult, I still found it a bit... hmm, not quite condescending, but perhaps a bit too... instructive?
The prince of the story is orphaned in infancy, and worse, partially paralyzed due to an accident. His uncle seizes his rightful throne, and has the boy imprisoned in a remote tower, with only a criminal nursemaid for company. But what no one knows about is the boy's (fairy?) godmother, who gifts him with a magic traveling cloak and some words of wisdom.
His cloak (a symbol for the power of imagination?) allows him to learn about the world, to such a degree that when the time comes for him to claim his rightful place as a just ruler, he is able to rise to the occasion...