I sat my 7yr old son down and showed him my ledger nano and how to use it in case anything ever happens to me.
I explained there is electronic money on it and it will be his one day. Went through the process of wiping it and restoring with the seed. But reminded him never ever tell anyone about it is our secret.
I do not think i would understand these things when i was seven years old and as a kid if he is excited about what you tried to teach him he will tell everyone about his dad's secret money that could make him rich, he is too young to keep secrets anyway. I explained there is electronic money on it and it will be his one day. Went through the process of wiping it and restoring with the seed. But reminded him never ever tell anyone about it is our secret.
I do have kids but they are busy playing and they wont understand anything even if i try to teach them about bitcoin and it is not the right age to understand these things. 