It’s a Disney sci-fi fantasy story. I’ve been seeing quite a few movies geared toward preteens this summer with my niece. Because we watched the first two seasons of 'Girl Meets World' together, I know she enjoys Rowan Blanchard and Sabrina Carpenter. That’s how we stumbled upon this Disney television film, which is based on a book of the same name. I was hoping it would be as enjoyable as that TV series, and my n…