You can choose physical tickets or an email voucher for CityPASS.
Brad's Deals Editor Jim,
Save up to 41% on Admission to Four Dallas Attractions during this promotion from CityPASS. Adult passes are $46 and kids passes are $31. The deal includes access to both the Perot Museum of Nature and Science and the Reunion Tower GeO-Deck. It also includes your choice of admission to the Sixth Floor Museum or the city's Zoo. Finally, you get to choose between admission to the George W. Bush Presidential Library or the Arboretum and Botanical Garden. These vouchers are available on mobile, so you don't have to carry a physical ticket if you have a smartphone with you. Sales tax is included in the price of the voucher.