Write the interaction as a short script
Describe who presses, lifts, turns or removes each element and what the audience should notice next. Limit the sequence to the decisions the model must support. A single illuminated route can be stronger than a panel of unexplained buttons, while one slow hand-driven cutaway can communicate a process without pretending to reproduce operating speed. Record the rest position, maximum movement, reset step and expected number of demonstrations per day. This script becomes the basis for mechanism design, labels, presenter training and the acceptance review.
Separate display from real control
Presentation lighting should remain low voltage and electrically independent from building, machinery or safety systems. Use the supplied adapter and controller, provide accessible isolation, protect cables from pinch points and keep ventilation openings clear. Manual mechanisms need restrained travel, guarded linkages and surfaces that can be inspected. No moving model should be used to validate load, pressure, speed, temperature or operational safety. If the exhibit communicates hazardous infrastructure, labels must clearly distinguish the simplified story from emergency or operating instructions.
Plan service and transport before launch
Make lamps, controllers, removable modules and wear points reachable without dismantling finished scenery. Keep a small inventory list for detachable parts and photograph their packing positions. Before every move, isolate power, secure motion, fit protective caps and use the agreed lifting points. The destination team should receive setup, shutdown, cleaning and fault-reporting instructions with the approved revision ID. After transport, inspect the base, fasteners, cables and motion stops before public use. Damage or unexpected resistance is a reason to stop the demonstration, not to force the mechanism.