Get 'em while they're young

What’s the collective noun for this: Over 50 students from Charles Tupper school, assembling at Second Beach for a bike tour around Stanley Park.  I don’t know if it’s an end-of-the-school-year tradition, but this is the second of three groups that have made the trek so far in the last week.
Paul, their leader, says they bring their own bikes or rent them on Denman, and then circumnavigate the park, stopping at key points to learn about the park.

And then hopefully continue on for the rest of their lives.