The answer is very subjective. It certainly depends on your children and your personal situation. I think this can be a slow education lesson from an early age. Start with discussing at a high level what is going on with you and your spouse. Discuss the "why" and "why not" behind things you do with money. Let them see you bargain shop or not purchase something because it is too much money. Let them see you enjoy some reward, like a vacation, due to saving diligently throughout the year. At the end of the day, lead by example, as I’m sure much of your financial life was shaped by your parents. Don’t lose sight of that. As your little sponges (I say affectionately) absorb your wisdom, be purposeful in your words and actions about money. There is no right or wrong time to bring them into your finances, but always keep an open dialogue.