11. Where are they?
12. Where are the shoulder-blades?
13. Where are the collar-bones?
14. What are bones made of?
15. How can we show this?
16. What is the difference between the bones of children and the bones of old people?
17. Why do children's bones bend easily?
18. Tell the story of the lame lady.
19. What does this story teach you?
20. What happens if you lean over your desk or work?