After eating and drinking, me and one of my cousins went out for a walk and saw three boys drawing something in the mud. I approached them with interest and watched them make the Bitcoin logo in the mud and compete to see who could make the logo more beautiful. So I asked about this logo and one boy said that his parents have this bitcoin and his father taught him to draw this logo and he taught his friends. I was very happy to hear this from the boy because in such a village where there is no good mobile network people are involved with Bitcoin.
It is art and children love art. They draw things they know and know recently but they even don't know what it means technically. Children are hungry to discover new things and if they have fun with new things, they love it.
It is good start for children but if you want to teach your children about Bitcoin, you must maintain it very long time like education. If you stop it, they will forget what Bitcoin, what logo it is after a few months. Some children with good memory will not forget but most of them will do forget.
Honestly I don't think we need to teach children too technically about Bitcoin as they are young and they should enjoy their childhood as most as possible. Don't put them into pressure of learning Bitcoin too early. They have many years ahead to learn from education to Bitcoin.