Monster Trucks Fire Rescue Color Shifters Playset. The action is fast and the color changes dazzlingly with the Hot Wheels Monster Trucks Arena Smashers 5 Alarm Rescue Color Shifters playset. Kids can drive the included HW5 Alarm Color Shifters into the ice water tank of a detachable semi-truck to start the first color change before aiming at the flames. Hit the target spot and the 5Alarm falls into the stands: the two included break-apart cars and the Monster Truck fall into the hot water and… the color changes again! Take a few spins on the spinner to shake off the excess water before repeating the challenge!