While a vast majority of the world's population has access to mobile phones, one third of humanity, 2.5 billion people, do not have access to proper sanitation. Aiming to educate museum goers on such topics as the problem of feces and the environment in a fun and interesting way, the National Museum of Emerging Science and Innovation in Tokyo presents an exhibition focusing on the toilet. In a country known for its high-tech smart loos, this exhibition explores what the ideal environment-friendly toilet could be. Featuring a giant toilet slide and poo-shaped hats, "Journey of Poo" also includes a chorus of singing toilet bowls. One toilet we wouldn’t want to miss is the angry lavatory which when asked out loud what would happen if the world's loos refused to do their jobs, encouraged toddlers to say 'thank you' after flushing. Take your date and you can make your own poop from plasticine. Exhibition closes October 5, 2014.