The conversation is between two friends, Sam and the narrator. Sam is initially hesitant and afraid to play with a cardboard shark, but eventually warms up to the idea. The narrator tries to reassure Sam that it's not scary and that they can have fun with it. They make a deal where the narrator will go to the dentist if Sam plays with the shark. As they work on the shark, they discuss sharks, aquariums, and the safety of divers who interact with sharks. The narrator also explains the mechanism of the shark's movement and how it will work. In the end, Sam is brave and willing to play with the shark, and the narrator is proud of their friend for overcoming their fear.
Here are the key facts from the text:
1. Someone is being encouraged to go to the dentist.
2. A person is making a cardboard shark.
3. The shark is part of a deal to go to the dentist.
4. Cardboard notches are being made for the shark's jaws.
5. A ruler is not available for measuring the cardboard.
6. Hot glue is being used to assemble the shark.
7. Some people go shark diving, but they take safety precautions.
8. A steel cage can be used to safely observe sharks underwater.
9. Aquariums have large tanks with sharks and other marine animals.
10. Propellers are used on some ships for movement.
11. A motor can be used to power a propeller.
12. A cardboard shark is being made with moving parts.
13. Someone is afraid of the dentist and has a toothache.
14. A person is trying to convince another to go to the dentist.