Bob Dylan's canceled show in Glendale tonight got us thinking about his son, Jakob Dylan, who is still young and fit enough to perform in just over 100 degree weather. He's less at risk for heatstroke, sure, but, of course, the number of folks who will shell out cash to see Jake is definitely not in the same ballpark as the those who would see Daddy Bobby perform.That's kind of a trend, actually. Many children grow up to follow in their parents' footsteps, and the world of music is no different.