After learning about what motivates customers to buy students will create a tweet with a picture of an item. Their tweet will be to use one of the buying motives to appeal to their twitter followers (customers) to buy their product.
For example, a student could show a picture of a Ford truck and write something like: "Why buy something other than what your ancestors have always bought? #BuyFord #downwithchevy"
This is an example of buying based on patronage. Students will have fun coming up with appropriate hash tags to go along with their tweet!
This could be adapted to fit any class, any subject! Just tweak the requirements.