Kids should definitely learn how much work it takes to earn a certain amount of money, e.g. to be able to buy a tablet. Arithmetics and a sense for the scale of numbers should be taught to them at an early age.

I remember, when I was around seven years old, my Dad would give me a weekly allowance and add a certain percentage on top of it based on the magnitude of my holdings to teach me how interest rates works.
Then I'd save for a lego set, buy it and get back to low absolute interest amounts...