Ian Graham, proprietor of Colinton Clocks is once again hosting a free, hands-on exhibition at the Visitor Centre featuring a collection of wooden machines he has designed and built himself. The exhibition features mechanical clocks but also interesting and amusing machines such as drawing machines, ball runners and automata. These fascinating machines use gears, levers and other mechanisms to create movement. This hands on exhibition allows you to get involved, setting the machines in motion and watching the results.