This is a simple class but it's been really popular with my students.
The instructions are al in the ppt, but the general idea is that I put the students in pairs. I show a picture on the projector and the students have to descrbe what they see to their partner. The most accurate picture will win. I give them 2 mins for each picture.
It's really good for practising their listening and speaking skills.
The ppt is a bit messy towards the end.... I was basically just chucking in photos that I could use. I tried to find quite bizzare / complicated photos to make it as interesting as possible.