A feeding module for an address book includes a processor and a memory. A front to back and side to side twisting of the board is accomplished concurrently with the longitudinal tilting movement to balance the exercise experience and improve the subjects fore-and-aft balance. An optical circulator coupled to an input port and an optical circulator coupled to an output port can form a bidirectional pair capable of communicating with any other bidirectional pair of the optical circuit switch. The user is prompted for potential contributors to the electronic basket.