From my point of view, introducing children to learning about Bitcoin can be an interesting and enriching idea, as long as it is done appropriately and adapted to their level of understanding.
it's a good idea? Of course it's a good idea. First of all, teaching them about Bitcoin encourages critical thinking and curiosity, since it is a subject that involves technical and financial aspects (in this case, since they are children, it would be a good idea not to inform them in such a technical way, but rather in a more creative, simpler way). It can also inspire interest in technology and innovation, which could spur future careers in fields related to cryptography and computing.
it's complicated? I would say yes, since it is due to many factors, such as their mental maturity, I think that teaching children about Bitcoin will depend on how the information is presented, which is why certain strategies must be used to attract their attention. adapting the content to their level of understanding and presenting it in a playful and accessible way. using visual methods as mentioned above (cartoons) or also interactive games to facilitate learning.