Values education
By letting children know that toys can be bought, but they need to wait, let children gradually understand a value: if you want something, you need to work hard to achieve it.
housework
Let the children help with some housework. This kind of behavior has a psychological term called "attention training". Cultivate children's patience and concentration through housework.
reciprocity and mutual benefit
When the child makes other demands, as long as it is not too much, you can promise him first. Then make a small request to the child. If the child does it, his requirements will be met. Cultivate children's patience and concentration through mutual benefit.