When my son was a teen, he asked me if he could ride with me in the upcoming MS150 ride. I had ridden the previous year with some work friends. I said "Well you are gonna need a bike, what about this one?", and showed him the Club Fuji I had used for the previous year's ride. He had gone through a growth spurt and was nearly his adult height, so the Fuji was a good fit. After he took a spill when he drifted off the road edge while reaching down to shift, I installed a pair of STI levers for him. That was over ten years ago. He took the bike to college and then to his new job when he graduated. He told me that people he rides with cannot believe his bike is almost as old as he is. We still go for a ride sometimes when he comes home to visit, but he'll take my newer road bike with STI while I take one of the old ones.
1989 Club Fuji w/ 105 STI
Me in red, my son in orange at MS150.