i think teaching bitcoin to kids is nor a good idea until if any kid shows any wish to learn about it. it can effect negetively if we try to teach them about it forcefully against their will. we can build some play boards or kids ryms or music related to bitcoin just to put them in bitcoin related environment
Not just kids, even adults will not agree to know about bitcoins system if they are not actually interested to know about it. In my opinion too, teaching kids about bitcoin is completely unnecessary until they themselves want to know about it.
Actually this type of thinking might be coming from using kids to work for faucets as the time pass. That also very negative thinking in my opinion.