At 6 years your child is aware of the concept of money. They are capable of counting and understanding what their parents are doing. This is the right age for helping them to grasp the basics of money and money terms.
Read simple stories understand concepts and play games to help them understand the concepts of money.
At this age, we introduce the basic concepts of money and what does money help you to get. Basic understanding of Needs and Wants, what happens in a bank and other simple stories help lay the ground work for future understanding.