Answer:
they have no concept of the different values/worth it holds
Step-by-step explanation:
Unlike adults, children would see any money bill as a piece of paper with a number on it and that you can buy some certain things within that number range. What they don't understand is how it shouldn't be thrown or ripped as if it were nothing because it holds value and because that's what the world revolves around.
It's like if you were to exchange five of their favorite toys in exchange for a cup of coffee for example, those toys hold value just like money and if given away for something else without proper thought, there will be peole who become upset.
Children will spend money not considering that in most cases you can't get it back in most cases and it has to be earned by working jobs.