This is a germaphobe's nightmare. The fascinating invisible world is revealed at the world's first microbe museum. There are hands-on exhibits and microscopes to peer through and fascinating, if unsettling, facts about how many living organisms there are on everyday objects: do you keep a toothbrush as long as three months? It'll be host to seven million bacteria. There are also glass models of and information on viruses from ebola to smallpox. It's aimed at those aged eight and over.