First of all, for children, making mistakes is an inevitable part of the growth process, and they need to learn and grow through making mistakes. When children face an environment where mistakes are not allowed, they will feel very depressed and nervous, and may even be afraid to try new things. At the same time, if children get criticism and blame instead of encouragement and support after making mistakes, they may feel depressed and disappointed, which may affect their self-esteem and self-confidence.

Secondly, if parents and relatives have zero tolerance for small mistakes, children may feel lack of freedom and autonomy. If children are not allowed to try and explore freely when they make mistakes, they may lose confidence in their abilities and decisions. This may lead to their lack of confidence and courage to face greater challenges in adulthood.

Finally, if parents and relatives have zero tolerance for small mistakes, children may be inclined to make excuses and pass the buck. If children are not fully understood and supported when making mistakes, they may feel misunderstood or treated unfairly. This may lead children to try to find excuses or defend their mistakes, so as to reduce the pressure and sense of responsibility they feel.

Here are three examples to fully demonstrate:

Example 1: A parent always criticizes and blames his child after he makes a mistake. Because of fear of making mistakes again, children gradually become more and more cautious and nervous. However, during the school exam, he made a mistake because he was too nervous, which led to his loss of confidence and courage. Children are now more and more inclined to make excuses and pass the buck, because he thinks no one understands his situation.

Exodus 2: A relative is very picky about his child's little mistakes. The child now lacks confidence in his ability and is afraid to try new things. He often makes excuses for his mistakes, because he thinks it is the only way to escape responsibility.

Example 3: Parents in a family always give their children support and encouragement, even if they make mistakes. The child is becoming more and more confident and brave now because he knows that his parents will support him. He is also more inclined to admit his mistakes and take responsibility for his actions because he knows that he will not be treated unfairly.

To sum up, parents and relatives' zero tolerance for small mistakes may lead to children's lack of freedom and autonomy, easy to make excuses and shirk their responsibilities, and even affect their self-esteem and self-confidence. Therefore, parents and relatives should encourage their children to try new things and give them understanding and support to help them grow and develop.