A manually manipulable device adapted to present a changeable individual characterization to a user comprises a processor, a power source, a communications unit, a response generator and a proximity sensor adapted to sense the close proximity and relative position of a similar device. FIG.4 shows how a user manipulating the device can generate a sensory response in the response generator or otherwise in a response generator of another, at least similar, device based on proximity and relative position of said other device and the individual characterization presented on and by that other similar device at the time of interaction.