Trapped Dial Volvelles & Wheel Chart Booklets
What is a "Trapped Dial"? It is a mechanical device in book-like construction. An interactive wheel is sandwiched between front and back covers. Add a cover and bind in additional pages. You've created a memorable and attention-getting booklet style chart.
What is a Volvelle? A volvelle (French, meaning to turn) is a paper disc that when rotated can be used as a tool for calculations or other less scientific purposes.
See more examples of trapped dial products. Click this image.
Front to back: Wire Color Code Visualizer, Retirement Planner Wheel.
