The inductive/capacitive coupling technology and the radio frequency identification devices (RFID) technology are applied to analyze the relative position of multiple RFID tagged objects located within a finite three-dimensional space. The RFID tags of the objects are read by an antenna at a series of resonance frequencies, with an effective reading range of the antenna changing as the resonance frequency changes. The spatial sequence of the objects is derived based on the information of multiple sets of RFID tags in multiple readings. The technology can be applied to a variety of toys and teaching tools, such as the Tower of Hanoi game.