The Order of Secrets
This is a clockwork shaver that consists of a flat metal box which fits in the hand.
Pedal Powered Skates
They resemble short skis with one rubber-tired wheel just in front of the foot and the other right behind the heel. Putting weight on one of these skates pushes a rack past a gear connected to the rear wheel. Lifting the foot allows a return spring to return the rack to the top of it’s stroke. Speeds of 20 mph is possible.
Portable Fire Escape
This consists of a tube-like clamp with loops at either end, through which a rope passes.