I'm a big fan of digital storytelling, and Little Bird Tales is a free web-based tool that is both teacher and student-friendly. Adding narration is easy. Images can be uploaded drawings, and images, but there are also embedded drawing tools. The social aspect is powerful, too. Young authors can be part of a community of story-tellers and have their work published. Always a popular tool among my pre-service teachers in our digital storytelling work. (https://littlebirdtales.com/)