Shopping

You need a list of 40 items with the word a/an/some written in front of it. You also need at least two pictures of each item on separate cards (80 pictures).
Half the students divide the pictures randomly between them: they are the sellers.
The others, the buyers, take the written lists and each chooses 10 items he wishes to buy.
The buyers then approach the sellers, who do not openly display their wares, and request their items. Do you have any apples? Yes, here you are. / No, I’m sorry, I don’t have any.
After 4-5 minutes, see who has managed to buy or sell the most items.
Then the buyers and sellers change over, and pictures and lists are redistributed.

Notes

Sample list: carrot, book, hat, umbrella, coffee, flowers, radio, glass, match, wine, pen, knife, tea, vase, potato, coat, watch, milk, television, meat, eggs, shoes, butter, bicycle, pants, banana, apple, shirt, handbag, sugar, table, cake, rice, plates, bread, scarf, money, gloves.