Discounts on "The Polar Express" ShowingsSee the coupon page of the Fort Worth Convention & Visitors’ Bureau to snag a coupon for $2 off admission to a showing of The Polar Express at the Omni Theater in the Fort Worth Museum of Science & History. This coupon is good through Jan. 3. You can get up to 4 discounted admissions with one coupon. Tickets are regularly $9 for adults and $8 for kids. For showtimes, see here.