What is the object? What is it made of? What was it used for? What are the modern alternatives?

Work in groups. Try to identify these objects. Discuss what they were made of and explain their use. Who do you thin kused them? Can you think of the alternatives we would use today?

(Students work in groups. Each group chooses one object and make a discussion on it. After 3 minutes, ask four groups to present their discussion respectively.)