Watch Online Free HD Solarmovies. One of a series of short animations based on the writing of a group of preschoolers, “Supergirl” is an exuberant and gleeful exploration of the yearnings and imaginings of one irrepressible four-year-old poet. With a visual style that perfectly matches the free-flowing musings of the text, this whimsical film captures the magic and effortless creativity of childhood.