Let your kids know that bitcoin is the surest way to financial freedom, teach them now that bitcoin is of more value than fiat currency, educate them about the importance of bitcoin to mankind,
Yeh absolutely it's an important knowledge for kids to know because due to inflation the value of fiat currency going down which is woory moment for them who hold fiat for future, because after few year same amount of dollars will not worth like now. So personally I will teach my kid to guide them about the importance of Bitcoin and also will teach them that how Bitcoin will safe your fund from devaluation,
I think not providing knowledge of Bitcoin to your kids from now will be a fool decision for you
Explaining them about these economical stuffs and other things like technicality of crypto as a whole then it would really be just right that you should consider out on an age which your children
do able to comprehend on what you are trying to explain up on things because there's a certain age which you cant really be able to make them understand which it would be pointless
if you do really tend to make out some explanation just because they dont still understand on things but its true that the earlier would be better to be
aware of these things.