Device with flapping display

A toy comprising:

• a magnetically responsive member;
• a base;
• a protrusion holding member fixedly attached to the base and defining a protrusion holding space;
• a printed circuit board (PCB) comprising an electromagnetic coil, and a plurality of light emitting diodes (LEDs) distributed in a first direction, wherein the PCB is attached to the base such that the PCB is flappable relative to the base to oscillate the LEDs in a second direction at a non-zero angle relative to the first direction, wherein the PCB is an operating position in which a magnetic field produced by the electromagnetic coil interacts with the magnetically responsive member;
• a protrusion member attached to a portion of the PCB, wherein at least part of the protrusion member is disposed in a protrusion holding space and engages the protrusion holding member to limit translational movement of the PCB out of the operating position;
• a signal generator operatively connected to the electromagnetic coil to generate a coil control signal in the electromagnetic coil;
• and
• a controller comprising:
• a processor operatively connected to the PCB, and the signal generator;
• and
• a memory comprising a non-transitory computer readable medium storing:
• a set of instructions executable by the processor to implement a method comprising:
• (i) controlling the signal generator to generate the coil control signal in the electromagnetic coil to produce a time-varying varying magnetic field that interacts with the magnetically responsive member to induce oscillatory flapping of the PCB and the attached plurality of LEDs relative to the base.