As your child reaches this stage, he is aware of using coins and notes for purchasing something in return. Your child is aware that money is important to get things from the market and without that he will not be able to buy anything.
What you need to know:
At this stage, your child is open to learning, you should teach your child to use money in a better way. He should learn to save money and understand the value of it. Give a piggy bank to your child and also start giving him a nominal amount to save for the things, he wants the most. He will feel responsible and also love to save money for himself so that he could put that money to good use.