Disney’s The Little Mermaid makes a holiday splash in a new Houston production created by Theatre Under The Stars. Ariel’s restless curiosity carries the story from an undersea kingdom toward the human world, with beloved Alan Menken songs such as “Part of Your World,” “Under the Sea,” and “Kiss the Girl” anchoring the adventure. Broadway-scale staging, vivid characters, and a generous December run make this an easy multigenerational outing, while the heroine’s search for courage.