Starting them early works! In 1988, my youngest son, David, got a plastic "con-tar" (as he called it at the time) for his 3rd birthday; I was on the back porch, wearing a hat & playing, so he put one on, grabbed his ax, and joined me:

Here he is last winter, gigging with his band The Ducks (from Mississippi John Hurt - "If the river was whiskey and I was a diving duck..."). He's 2nd from left:

OK, his start wasn't as auspicious as Erik's, but the end result was good! Peter