text: Add a little zoom to your kids ' day with a stop at Sahara Speedworld ( Tel . 702 / 737-2111 ) , a huge ( 40,000-sq-ft / 3720-sq-m ) playground of virtual reality auto racing in life-size race cars , dozens of interactive rides , and two 3-D theaters .
  
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  The Sahara Speedworld is only for adults .