[IKE]

Have the students do the talking.
Make sure your students go over the "Awards" before competition.
Many judges (especially returning judges) are looking ofr info for a specific award. If they are asking you questions about the team involvment and recognition in the community, there are not likely there for "robot" related awards.

In general, treating the judging as an informal interview works well. A good tip for interviewing is STAR format.
Situation/Task: Background info relative to question and answer.
Action: What you/your team did.
Results: How it worked out (measureables are good).