They should have printed the Meritbadge.org worksheet for Communication MB. They can do any of the following tasks ahead of the campout to help complete the MB, but we can work on any of these at camp:
Think about a topic for a 5 minute speech on any topic. Bring an outline of what you might cover in the speech.
Interview someone you know like a Grandparent, Aunt/Uncle or Family Friend about their profession or hobby and prepare an introduction to me as your counselor as if you were going to introduce them to me or your patrol.
Research Careers in Communication, identify 3 or more and select 1 to research education, training and experience needed to be successful in that career.