Money education in life

To let children know about coins and currency exchange rates in different countries as soon as possible, I thought of an interesting thing: for birthdays/new years, you can pack coins from different countries, let them think about which one is more valuable, and then teach children how to exchange them for domestic coins before they can be used (this includes math knowledge). So year after year, kids will know how to use algorithms to tell which red envelopes are more expensive. Well, when children collect a lot of money, they can also teach them how to calculate interest, put it with their dad (acting as a fund investment manager), or put it with their mom (acting as a bank), or their own cash savings, and how much they will get after a year. Letting children understand the different ways to handle money affects the value of money.
Also, you can teach children to buy and sell things at an early age, so they can learn about the appreciation and depreciation of prices. You can learn what to buy and what not to buy through interaction with parents. Of course, in addition to using red envelopes for transactions, children can also use the barter method.
To instill a child's view of money in life, this is the first step in financial management. Then when the child wants to buy an expensive item, teach the child to judge the value of the item and whether they have the financial ability to buy it (if not enough: how long will it take to buy it? (Should labor be exchanged for money or time for money?) , and whether such items can create wealth and bring him more money. With this concept, children know how to handle the money they already have, and also find ways to add more money (financial thinking).