Dog Pond - Place a plastic kiddie pool in the ground. It'd be easy to clean and looks nicer than having it above ground. Big dogs can't chew it up or drag it around. This is obviously more fancy than a plastic kiddie pool underground, good idea thou
Tiger tug-o-war! This zoo gives the visitors an opportunity to test their strength against big cats. This is an awesome idea! And a cool, safe way to interact with the animals. Play tug-o-war with a tiger.