Cannons
Loading them

Unloading them

With the aid of a drill and a tap on a long shaft Robin finally extracted the ball jammed in one of them:

Of course we would never dream of firing them but here is a quick mock-up in photoshop of what it might look like:

The pictures can be accessed by clicking the thumbnail but they tend to be 900K+ files
Pictures by Nigel Hewitt
Thumbnails by Easy Thumbnails