The present document describes an entertainment device including one or more mini-crafts provided in a fluid medium within the sides of an electromagnetic frame. Each mini-craft includes a magnet and has a different cutoff frequency. Motion of the mini-crafts may be controlled by a user using a controller such as joystick, remote control etc. A processor computes, based on the multidirectional navigation signals received from the controller, electromagnetic signals for each coil in the electromagnetic frame. The electromagnetic signals are amplified and sent to the coils to generate superimposed rotating magnetic fields which cause the mini-crafts to rotate separately within the electromagnetic frame, each mini-craft following a distinct magnetic field with a frequency that is lower than its cutoff frequency.