Animoto is a very simple tool that can be used to create slide shows that look fancy. You can easily add voice recordings behind the slide show and edit transitions, backgrounds, and themes. A free account allows students to make a 30-sec video, but a educator account (free if you apply) will open a lot more features up to your students.
Project-Based Learning: Slideshows, especially with narration recorded behind, can be a fun way for kids to share what they’ve learned. Easy application for social studies projects!