We recently had our first student-led conferences of the year. Like many schools, this is a time when students walk their parents through some of their learning over the term, as well as reflecting over the first 3 months of the year and setting goals for the next term.
This term a couple of our grade 4 teachers used garageband to have students record their self-reflections. They then posted the reflections on their class website, making them available to return to on an ongoing basis.
I took your wonderful idea and tried it with my grade twos with great success and little effort on my part.