here's randi kaye. >> look at those birds in the back. >> reporter: barbara harvey does not fit the stereotype. she's 72 years old, a grandmother, and she loves to smoke pot. so today is a dream come true. a cannibis tour, now one of the most popular attractions in denver. think napa valley wine tours, just replace the vice. >> these are all dispensaries in colorado. we have more dispensaries than starbucks. how sweet is that? >> reporter: tour members get vip access and are quickly ushered into private rooms to make their purchase. first stop is the 3d dispensary. >> what about joints? do you have some joints? >> we have some prerolls. >> this is so if you don't want to smoke the whole joint you can put the remainder for later into this. and store it. it doesn't get smashed up. >> what's that called? >> what's this called? >> a doob tube. [ laughter ] >> reporter: barbara buys two