An interactive device includes an organ emulation device for contact with a body part of a user; a capacitive sensing device disposed in the organ emulation device for sensing a relative motion of the body part of the user to the organ emulation device and outputting a sensing signal corresponding to the relative motion; and a multimedia device in communication with the capacitive sensing device for receiving the sensing signal, and outputting a multimedia signal based on an information indicated by the sensing signal so as to respond to the relative motion. The interactive device exhibits enhanced virtual reality effects.