Creative thinking is central to all teaching. Here is a good idea to prompt students and get them to take their minds into different places.
Provide some lines, dots on a piece of paper. Or use this template ELT Buzz Teaching Resources made.
Students finish the picture with their own creativity and then show and explain to the class.
Another similar activity is to put on some instrumental music – CCmixter has a lot free and copyright (CC) free. Then, students draw a picture, what they “see” in their head. Then explain and share to the class or group members.