No.
Measuring weight is not a helpful marker of physical or mental health and it perpetuates the myth that you can tell a person’s health from their appearance.
Emphasising weight is also likely to add to the shame children and their families may already feel and feed into negative stereotypes of those in larger bodies. Weight comparisons between children can also lead to teasing and body shaming.
Already, almost half of children and young people don’t like their bodies. This is often because of negative perceptions of their weight and the belief something’s wrong with their body. Drawing more negative attention to a child’s weight will only exacerbate this problem and increase their risk of developing eating disorders.