Students are given a little package (or just a couple) MMs, skittles,etc. and they can choose which questions to answer/share with the group based on the candy color. I like doing in small groups and then sharing out one of thing about each person.
Another good icebreaker to play on the first day of school. You skittles to ask questions. This allows the teacher to know her students and students to know their peers. Creates a positive environment in the classroom starting