At a high level, challenges in Beanstack are based on tracking reading and/or activities and earning badges at certain milestones based on what a student has read or done.
Upon completing a milestone, a student will earn a badge that pops up on their screen. They may also see a prize attached to that badge and receive instructions for collecting that prize at school.
In Beanstack, all challenges rely on badging. When a student reads "x" minutes or books, that student earns a badge. When they read "x" more minutes, they earn a new badge. And/or, if someone completes "x" activities, s/he earns a badge. Sometimes those badges are attached to prizes, and sometimes they are not. The media specialist/librarian setting up the challenge chooses the milestones at which a student receives a badge as well as the badge image and possible prize attached to the badge.
Keep in mind, your district probably has a year-long, district-wide challenge running. This challenge should not be edited in any way. However, you are able to create challenges to complement that district-wide challenge to inject bursts of energy throughout the year.