Each student should draw 2 or 3 pieces of paper. On these pieces are lines like: Tell me something about rainy days. Tell me something about chocolate. Tell me about something with four legs. etc. Students should take turns in speaking.
The exercise works for several reasons: they usually personalise these topics and start talking about what is important to them, you get to know them, they get to know each other and you get to make mental notes on their level of knowledge, strengths and weaknesses.