An apparatus including a bicycle having a top tube, a frame connected to the bicycle, and a combat vehicle simulator interchangeably connected to the frame. A laser tag system including a laser tag gun and a sensor also preferably is connected either to the bicycle or the frame. The laser tag gun preferably is mounted on the front of the frame facing forward and the sensor is mounted on the back of the frame facing rearward. The frame includes an elongated member having a front end and a back end, and extending lengthwise along the bicycle; a first generally U-shaped section connected to the front end of the elongated member; and a second generally U-shaped section connected to the back end of the elongated member.