Great to get started now! So many parents didn't do this, and schools never did this.
Jobs that they are responsible for even not getting paid.
Teaching children that the order is earn, save, invest, spend...everyone does spend first for some odd reason. And showing them each.
Praise always works best, as well as leading them by example (without letting them into too much of the adult world of course)
Here is a great primer
Also, if you can, find an organization in your community for junior entrepeneurs. And please, if you get a chance, talk to their school, PTA, or community group about just an introductory course on household finances: opening an account, simple taxes, paying bills, debt, credit cards, interest, minimum wage, job responsibilities and safety, resume writing, etc.