Ice breakers are activities at the beginning of training programs that help participants feel more comfortable. Effective ice breakers involve all participants, include some physical movement, and match the theme of the program. They should last 10-12 minutes and keep a positive spirit. Ice breakers should not be too long, too physically demanding, require extensive recalling of past events, or risk showing participants in a poor light. The goal is to ease participants, not disrupt or damage the program.