Writing is put into authentic practice with the poster advert. It also makes students read in an authentic situation.
Students can be as creative as you allow them to be. As a teacher, expect that they CAN do it, instead of ASSUMING they CAN'T do it. You'll be surprised what they can do.
Mechanical fold machine.. folds t-shirts automatically.. fantastic idea! The boy eating the Choc-Stick is because it was a free gift to lure the customers to buy the product, so you can brief your students on what makes a good salesman and a great sales pitch, after all, Malaysians love free gifts right!
Live demo makes all students enthusiastic and motivated to use the language.
My student explaining the product. :P Language (broken or otherwise) usage in its most authentic form in class.
The point is, any lesson which heightens motivation and gives students a purpose for speaking English cannot be a bad lesson. Steer clear of chalk and talk, my message is that a teacher's core duty is to EMPOWER HER STUDENTS. Trust that they can do it and you'll be impressed with the outcomes. :P