Another "awww" chapter, Princess is really on a queenly roll here with family stuff. As a guy who likes to do some woodworking/construction too though I can also say that it wouldn't have been doing the men there any favors by trying to "relieve their burden", if anything they were probably delighted at the excuse to do something fun like that and all as a part of a fun bit of hijinx too. And subordinates able to spend some down time on their own projects also seems like the kind of Demon Castle that Demon King would be going for too.
also, THAT PAGE 4 haha. Princess' mind is a magic wonderland.