At the risk of sounding cliched and sappy, cherish these times. Even though my three sons have grown up to be great human beings with children of their own, I sometimes regret getting stressed out about the little things when they were young. When I did, I missed out.
Not sappy at all. It is just a car, and it can be cleaned, polished, painted, repaired or replaced. My Dad was really good about sharing his toys and building automotive experiences with my brother and I. Imagine being 18 years old and driving a blacked out '86 Buick T-type to school or drag racing in an L89 396 powered '81 Malibu (both that we built as a family). He didn't have to share, but he did. My kids have the car bug - so how can I not cultivate that further in order to strengthen our bond?
I look forward to them getting their licenses and asking to borrow a car, then pointing them to the garage and saying:
take your pick.