Is it good feng shui for children to wear other people’s old clothes?

Not good. This actually has nothing to do with Feng Shui. For example, meals that others have eaten. Let you eat again. Can you eat it? Let’s put it another way. Everyone responds in mind. uncomfortable. And the same goes for children. Clothes worn by others. Let the child wear it again. Are you sick? Mysophobia in children. Are there any big taboos? Clothes are not expensive now. Why are you wearing other people’s clothes?