Travelzoo offers a Smart Destinations Go Las Vegas 3-Attraction Explorer Card with prices starting from $68. (Groupon Getaways charges the same.) Or get a 5-Attraction Explorer Card for $99. That's the lowest price we could find by at least $7. Choose from 10 attractions including the hop-on hop-off bus tour, Madame Tussauds, High Roller observation wheel, The Mob Museum, and more. The promotional value must be used by March 31, 2017.
Of note: A Child's Pass is also available from $59. That's another price low by at least $6.