I never knew there was such a thing, but the Museum of Poo is alive and well on the Isle of Wight. However, the museum is taking a year's sabbatical and taking their poo show on the road!
According to their website, there are things to sniff, handles to turn, pipes to talk through, buttons to press, and a huge collection of preserved poos to get up close to! Sounds fascinating, I must admit (although I'm not sure about the things to "sniff").