In past years, I’ve had kids walk around the room and do surveys at the beginning of the year to get to know each other and start building a sense of classroom community. We would also practice turn & talk with getting-to-know-you topics. But those types of activities may not be allowed right now, so a good option is Sit or Stand.
Basically you just call out something like, “Sit down if you prefer chocolate milk. Stand up if you prefer white milk.” Then take a minute to have the students look around, see who answered the same way, and talk a little bit about their choices.