• A gallery with about 100 sq metres of open floor space.
• Electrical power – four plug sockets.
• The exhibition must be supervised at all times when in use, preferably by staff accustomed to working in an interactive environment.
Trip hammer – Turn a wheel to rotate a drum with cams mounted on it. These push down the end of a beam then release it, raising and lowering a hammer which pounds on a small anvil.
Water wheel – Control the flow of water from a ‘Millpond’ onto an undershot waterwheel by means of a sluice gate.
Windmill – Move a fan to change wind direction and rotate a post mill to optimise its position in relation to the wind.
Siege engine – Build a castle wall out of wooden blocks, then attack it with a small siege engine firing ‘rocks’ to see if they can demolish it.
The knight – Children can sit on a rocking horse and try and hold a lance with and without using the stirrups while rocking. It is far harder to hold a lance without the stirrups to brace you than it is with them.
Stained glass – This is an illuminated jigsaw allowing users to construct a replica of a window in York Minster.
Arch – This is a tabletop model of an arch which can be built up from wooden blocks.
Flying buttress – This is a flexible arch which users can try and collapse by pushing down on the top. They can then put a flying buttress against it and see how much stronger this makes the arch.
Wooden bridge – Users have to try and bridge the river using logs which are in themselves too short to cross the gap.
The compass – A compass mounted on a model medieval ship is used to navigate it from London to Norway and to find the directions to Amsterdam and Hamburg.
The loom – Weave wool on this small loom in exactly the same way as medieval weavers.
Printing press – Make simple words with letters provided, place them in racks, ink them and then print them using a simple press.
Clock – Assemble the cogs and hands of a simple skeleton clock and set it going.
Tiling – A table with three squares on for creating medieval tiling patterns using triangular tiles.
Inventions and borrowings – This is a table with models or examples of some of the key inventions of the period not shown elsewhere. These are: spectacles, a silvered mirror, the hourglass, the wheelbarrow, chain mail and the cannon.