I've found a cool way to make almost real houses! Make your exhibits with something clear(that's where the guests will see them) make sure to make an outdoor exhibit with food, water bowls/troughs, and shelters. Then, on the inside, put toys and such in there so the guests will have fun watching the animals have fun. Then, make put a concrete(or brick) fence around the the house with two open spots for people to go in and out. Then, with the elevated path, make a roof that almost perfectly fits the exhibit and viola! An animal house!!!