Your 15 or 16 year old probably knows this lesson all too well, but your younger children may not. It is never too early to introduce them to the facts that going places they want to go costs money too. Use this as an opportunity to talk about the advantages of having one type of car over another. An SUV guzzles gas but it is often necessary for larger loads. Hybrids save lots of gas but can cost more upfront. Find out how your children might save on gas like consolidating trips.