Hey - that's great - both that they are constructing a shelter, and who is doing the construction. Various of my now-deceased relatives would approve - Uncle Mac, Grandpa Smith, Uncle Bill, etc. - all were in favor of teaching kids to build things, and be constructive citizens in the literal meaning of the phrase.

Timely, too - getting up a roof before the autumn windy rains come would likely be MOST welcome by regulars!