How does child labour affect the physical and psychological development of the children?

It makes them very mad because when they were in the mother's womb they felt warm and good.

Although the children can get physically stronger, they can also suffer malnourishment as well as physical exhaustion. Depending on what work they're doing, you could lose limbs or develop various diseases. Psychologically, imagine you had to do manual work every day until you were exhausted. You would be afraid of working at all. You could become depressed or be driven to madness.