Those kids should be in school!
They should be in school, but are instead out taking a walk. Seven of them started
and now, ages ranging from 11 to 21, there are 26 of them.
Truants! They should be in school -- that is, a "normal" students-in-a-box a school where they can be kept safe from undue influences. Instead, they are trekking from Hudson Bay to Ottawa (~1,300 kilometers).