There is a volunteer neighborhood cleanup going on in your community. A young boy who is helping out by dragging a heavy bag of litter all of a sudden lets out a loud cry of pain. You are thinking that maybe the boy pulled a muscle. To your surprise, you notice that his hand is dangling as if he broke his forearm. You rush the child to his parents, and he is hurried off to the hospital. Later that day, you see the boy's father, and he tells you how the boy is doing. He laments that his son should really be more careful about his activities. His son has broken both his legs twice, as well as that same arm, on the padded school playground. He then explains that it take a long time for the boy's bones to heal. The father mentions that two years ago the boy lost his hearing in one ear after getting too close to an exploding fire cracker. The father ends the story saying, "Otherwise, he is your typical kid. He hardly has a sick day off from school, and he is growing like a weed." Why is this boy so accident-prone? How is it that his bones break so easily?
What can you conclude about the ease with which the child's bones break? Is it normal for a child to be this accident-prone? Should activities such as dragging a heavy object cause bone breakage?