The average fan arrives to a Hanson concert, enjoys the show, and heads back home, but what they may not notice are the six smiling faces on the sidelines or backstage rocking out to their dad’s music. The three Hanson brothers — Isaac, Taylor, and Zac – have packed up and hit the road for their Walk Around the World Tour and for the first time are taking their families along for the “adventure,” as Isaac’s wife Nikki jokingly calls it. “Because this is the first time with all the young ones, it’ll be really interesting,” laughs Isaac, 27, whose brood includes Nikki and their boys Clarke Everett, 18 ½ months, and James Monroe, 4 months on Saturday.