I think I was 9 or 10 before I started earning pocket money (we were pretty poor too) and it was 50c a week for keeping my room clean and taking the bins out I recall. I dont think they really have a concept of money unless they are learning in school or you have specifically taught them. I then went on to have more but I dont recall it ever being more than $5 unless I did a massive job that needed doing, like cleaning the fridge and it was extra and to save towards something I wanted to buy.

I remember my first layby was a doll I had wanted for AGES, it was $80 back then so was super expensive and we couldnt afford it. MAN it felt good the day I paid off the layby with all that hard work haha

I like the idea of the job chart and stuff. I dont think my kids will be getting lots of $$ for pocket money, 50c still seems a good starting point into a money jar that we take down to the bank once a month for their bank accounts

Anyway you approach it will be fine I think, the goal is the same to teach responsibilty with $ and learn how to save them.