I use this exercise every year when teaching Kafka's METAMORPHOSIS. I have used it both as a group and partner exercise.
Students discuss and create three possible explanations for the symbolism the apple in Kafka's METAMORPHOSIS. They then decide on their favorite explanation for the symbolism of the apple.
I find the success of this exercise is due not only to the effective group/partner exercise, but also to the fact that students take ownership of their discussion by prioritizing their discussion results. They end up choosing and placing their favorite explanation within a drawing of an apple that sits at the top of the handout.