The children will be able to tell the story of Thomas looking for verification of the Resurrection.
If you're short on time, have a list of possible questions and responses that the children might want to borrow for their interviews. Or spend time as a group brainstorming the types of questions that a reporter might ask Thomas in an interview.
For the children who feel uncomfortable role-playing in front of others, offer the opportunity to do the behind-the-scenes work. Suggest that they write cue cards for the interviewer.