I supported my son when he expressed interest, but stayed clear of his training so he could develop as his own person in the department. At our first structure fire together, he was put on a line at a window venting smoke while I went into the attic to hit hot spots. He joked to the others that he thought it was very unfair the old guys have all the fun. His training officer explained that the old guys know what they are doing...He wasn't whining, just venting the rush from the first time for real. Because of college he isn't as active now, but I'm looking at recruiting grandchildren if they feel the urge.