John, I'm sure the reason is the youngster's familiarity these days with all things computer. Show them a manual lathe or milling machine and there is no link at all. The CNC however with its' logical process is something they can relate to after several years of game playing/internet surfing or picture/video/sound editing. How many youngsters reach the age of 10 without having used some sort of computer for many hours?
I'm not at all sure that this loss of practical interest with the young is restricted just to our interests either. For many years my children were interested in rc model car racing and I became involved in the organisation. When they started 12 years ago it was difficult to get an entry in a field of 140 drivers. When my son stopped 2 years ago to go to university we were lucky to see an entry of 35. Entry fees were much cheaper, cars both cheaper and more available. The kids just did not want to get cold and wet to race rc cars and there is just too much else to do these days. We lost many to the usual (girls, beer, full size cars etc) but also many to more energetic sports, football, mountain bikes, karting and more surprisingly perhaps, many dropped out because they needed to keep up with their studies - not as easy as the papers would have us believe these days. This vast range of activities available also affects the number of youngsters joining each year, at the start at least 20 would join just after Christmas and about 6 or so would stay, later we would be lucky to get 4 with maybe 1 staying.
So, time pressures on the young are much greater than we experienced in our day. By the time they have been to school, computer club, karate, football/netball, scouts/guides, music lessons, after school club (as well as breakfast club) and the hundreds of other activities they can be involved with there is not much of their day left. In 1963 we were given an extra 2 weeks holiday at Christmas because of the bad weather. We became so bored with sledging/snowballing etc that we cleared the road completely and played a 2 day cricket match to pass the time !
Perhaps we shouldn't worry too much about grabbing their attention when young but get them when they are 40 something and the house/family etc are sorted. With these typical lifestyles it is only the retired or truly passionate that has the time for our interest.
Sad to say I totally agree with you.
Ah well everything changes, just hope that when we are almost extinct that our "magic" capabilities doesn't get called "witchcraft". Perhaps we will all end up on the bonfire and I bet we won't burn as well as they used to !!
Regards
Keith