Here is a redo of the first posted ppt. I made it even more simple (for low level students) and I add an evolution game at the end. To play evolution, the students go through different stages. First, every students starts out as an ant, then they walk about around the class and find a friend and do the dialog. Then the pair of students do rock, paper, scissors. The winner gets to be a chicken and so on. When a students reaches pig stage, go and do the dialog with the teacher. If the student wins, get a sticker.
Happy teaching!