A computer-implemented method, comprising: receiving, at a first mobile computing device having one or more processors via a short range-wireless communication medium, a first input signal from a first set of pressure sensors of a first external arrangement, wherein the first set of pressure sensors of the first external arrangement is associated with the first mobile computing device, wherein the first input signal has been generated by the first set of pressure sensors in response to a first force applied by a first user; transmitting, from the first mobile computing device to a second mobile computing device, the first input signal, wherein the transmitting of the first input signal is executed by a transceiver of the first mobile computing device, wherein receipt of the first input signal at the second mobile computing device causes the second mobile computing device to generate and output a first output signal based on the first input signal, and wherein the output of the first output signal causes a second set of haptic actuators, which is associated with the second mobile computing device, to generate a second force to be felt by a second user; receiving, at the first mobile computing device from the second mobile computing device, a second input signal, the second input signal having been received at the second mobile computing device from a second set of pressure sensors associated with the second mobile computing device in response to a third force applied by the second user; generating, at the first mobile computing device, a second output signal based on the second input signal; and outputting, from the first mobile computing device to a first set of haptic actuators via the short range-wireless communication medium, the second output signal, wherein the first set of haptic actuators is associated with the first mobile computing device and comprises a first set of vibrators integrated in the first mobile computing device and a first set of piezoelectric actuators integrated in the first external arrangement, wherein the output of the second output signal causes the first set of haptic actuators to generate a fourth force to be felt by the first user, wherein each piezoelectric actuator of the first set of piezoelectric actuators integrated in the first external arrangement receives a variable current that alters its stiffness, and wherein the first set of vibrators integrated in the first mobile computing device vibrates the first mobile computing device. receiving, at a first mobile computing device having one or more processors via a short range-wireless communication medium, a first input signal from a first set of pressure sensors of a first external arrangement, wherein the first set of pressure sensors of the first external arrangement is associated with the first mobile computing device, wherein the first input signal has been generated by the first set of pressure sensors in response to a first force applied by a first user; transmitting, from the first mobile computing device to a second mobile computing device, the first input signal, wherein the transmitting of the first input signal is executed by a transceiver of the first mobile computing device, wherein receipt of the first input signal at the second mobile computing device causes the second mobile computing device to generate and output a first output signal based on the first input signal, and wherein the output of the first output signal causes a second set of haptic actuators, which is associated with the second mobile computing device, to generate a second force to be felt by a second user; receiving, at the first mobile computing device from the second mobile computing device, a second input signal, the second input signal having been received at the second mobile computing device from a second set of pressure sensors associated with the second mobile computing device in response to a third force applied by the second user; generating, at the first mobile computing device, a second output signal based on the second input signal; and outputting, from the first mobile computing device to a first set of haptic actuators via the short range-wireless communication medium, the second output signal, wherein the first set of haptic actuators is associated with the first mobile computing device and comprises a first set of vibrators integrated in the first mobile computing device and a first set of piezoelectric actuators integrated in the first external arrangement, wherein the output of the second output signal causes the first set of haptic actuators to generate a fourth force to be felt by the first user, wherein each piezoelectric actuator of the first set of piezoelectric actuators integrated in the first external arrangement receives a variable current that alters its stiffness, and wherein the first set of vibrators integrated in the first mobile computing device vibrates the first mobile computing device.