I usually use this with high school kids or university freshmen, but it's pretty easy to adapt to other levels.
It's a simple icebreaker game where the students go around and talk to different people in the class. Each bingo square has a short-answer question - each student asks another student 1 question, and writes the answer they get (and who they got it from) in the box. This keeps going, with students finding new people to talk to, until they fill 2 lines like a BINGO game.
With small classes, I have students ask each other 2 questions, and with a big class, each student asks only 1 before moving on.
Once a few students have filled 2 lines, I usually get everyone to sit and we talk together about the best answers.