Perspective “Viewing Rooms” 3rd/4th grade

I teach one-point perspective every year to the 3rd/4th grade class.  In the past couple of years I typically have taught city perspective drawings.  I saw this fantastic aquarium perspective lesson from Once upon an Art Room (grade 7), and I just had to try it with my little ones.  Some of the kids liked the aquarium idea and others changed them into viewing rooms for other animals.  We had wildlife sanctuaries, zoos and aquariums.