I created a short Moodle course called Badges Trial for Ontario-based adult literacy educators to use to earn badges and see how Moodle badges can be uploaded into the Mozilla Backpack. The course is on a public Moodle site so feel free to register to access the site and following login locate and enroll in the Badges Trial course found in the Active courses category.
You have to start at the Virtual Classroom for Adult Educators site.
I used the free Moodle badges in the course. You can earn four badges there.