For me at age 10 my children should understand the market and how it works, interpreting chats and deciding the next move of each coin from studying the price action of different coins. At age 13 the should start trading with a demo account and at age 15 they should have funded their first account. This would help them become financially independent, also help then limit future gambling prowess and also make them prepared for their careers
I still think trading and money are two very different things. Teach your child about importance of money from early age because we live in a capitalistic society that cares about money more than anything. If you have a house of your own, a car that you change once every 5 years, and putting some money aside every month after all of your costs then you will live life very comfortably and be very happy.
Don't get started with health and loss and sickness and love and all that because poor people live those things as well but they do not recover as easily, if I am sick then best hospitals awaits me when I have money, I can still die but at least I will die rich knowing everyone did their best and leave my family good money when I die, poor people die too and sometimes die from things they could have been saved from. Hence money should be thought at very very early age, as little as before school. After that you can start teaching trading when they are smart enough, depends on each kid.