I want to ask my parents for money to buy things. What is the best way to express it?

You can buy a silk scarf or a pair of beautiful shoes for your mother.

Buy some warm clothes for dad. In fact, my father likes to show off in front of outsiders. You'd better buy something that you can see outside.

If you have enough money, buy some nutrients or medicines for your parents' physical condition;

Also, they will feel very excited when they go home to see what is lacking at home now, or some practical new things that parents are not easy to think of and don't know at their age.

These are some of my experiences. Of course, what you buy is not expensive, and more will make them feel happy!