Kids of all ages are invited to dress in Halloween costumes for a photo opportunity with the Wienermobile in the Missoula Public Library parking lot on Front St., Thursday, Oct. 30th, 3:30 to 5:00 p.m. Pose in front of Oscar Mayer's Wienermobile with the drivers, who will be dressed as Ketchup and Mustard, for a picture to take home. Ketchup and Mustard will also pass out Wiener Whistles to attendees.