The ways that parents choose (or not choose) to teach their children are as varied as snowflakes. But I certainly understand your motivation based upon. Your childhood experience (or rather the lack of it).
This would be a good impetus for you to think about the entire subject and begin to develop a consistent plan that works for your family.
Regarding this specific situation, I think it would leave a sour taste in their mouths for you to be requiring payment for gas and time retroactively no matter how small the amount. It’s the principle involved.
HOWEVER, I think that there is one really good lesson they could learn from this. I see no problem with sitting down with them, pen, paper and calculator and going through the costs realistically no matter how minor. Gas, normal per mile costs for wear on vehicle, time; essentially the real costs they would experience in the real world dealing with companies, bosses or perfect strangers providing services.
Once that’s all added up you could hint playfully about a latte or whatever. Not as a requirement but to get the basic point across that if someone (anyone) does you a solid which is costing them something (time, money, whatever) it’s a good idea not to just take it for granted. Nothing in life is totally free.
The basic lesdon for them is: “Acknowledge your gratitude to whoever is doing you a favor in SOME way. Offer them some type of appreciation, an offer of payment, a nice gift with a beautiful thank you card (even handmade) but SOMETHING VOLUNTARILY without them asking. Don’t take it for granted
If you go through life mooching off your friends, eventually you won’t have any.
No matter how glad someone is to do you a favor, Dont Be a Mooch. Show some appreciation no matter who it is or how small the favor. Don’t take things for granted.”
And then drop the subject. Let them make up their own minds. If you’ve done as good a job raising them, (as I sense you have) let them surprise you with their response.
Speaking generally, I’ve been very impressed by people with financial wisdom (such as Clarke Howard and others) who begin training their children about money from the first time they’re old enough to hold it in their hands and understand how it’s used.
One fairly common method discussed by family experts is the 3 jars. Even young children who get allowances and birthday present money from relatives understand it.
The first jar is long term savings. Real long term. 20–30 percent right off the top.
Second jar is giving to others. That’s 10%. The child picks a cause meaningful to them.
The third jar is a combo of short term saving for a goal of personal luxury (video game, expensive sneakers, electronic device, etc.) and misc. stuff. Candy, mags, whatever. The child makes their own decisions and also mistakes and learns from them.
This way money doesn’t flow in and out of their pockets like water. But the kids have some amount of autonomy and accountability.
Even a very young child can have a passbook savings acct. and watch their money grow.
And they can also watch that 10% jar grow to an amount to donate to a charity that they choose all on their own.
There are also lots of variations on the above and some develop whatever method suits them and the family value system.
I liked the simplicity of the three jars the first time I heard it because even a young child can understand it and begin to make decisions about money from the get go.
The parents who do this treat these lessons as naturally as they do safety, good study habits, morals and values and whatever else they teach their children about. It just becomes part of the overall picture.
Anyhow, each family figures these things out according tonwhat they feel is best for them and their kids.