Both educational and hilarious (the shower scene!), it's understandable why Cane Toads is shown in science classes. An unusual approach to documentary filmmaking, but I doubt it will change anyone's mind about the problematic over-multiplying of cane toads.
Source for a narrative element of the Simpsons 'Bart vs. Australia' episode, this is a fascinating documentary about how the natural balance in an ecosystem can be thrown off with the slightest of interference. This a surprisingly funny doc, as scientists try to describe some of the toads' more bizarre behaviors.