My family (Wife and 3 yr old boy) is thinking of getting into bicycling in the evenings. We're just a few blocks from the Mississippi River, which has a paved levee for miles and miles. We're buying my son's first bike (with pedals) for Easter. Probably a Disney Cars or Spiderman training-wheel special. But I'm pretty clueless as to what to start with for my wife and I. We don't really want to drop lot of of money, but want quality bikes that will last (obviously I'll need to learn to tinker). What are some good bikes to look at? Are the selections at box stores (Academy, Wal-Mart, Target, etc) worth looking at? Or should I just go to a bike shop where the people know the product?