Prepare by familiarising yourself with the character creator tool, testing the design and save functions to ensure smooth operation, and considering festive themes to spark student creativity during the holiday season. Begin the lesson by introducing the interface, demonstrating how to select character parts using the back and next buttons, name the creation, and save it to the persistent gallery, which retains designs across sessions for easy revisiting. Facilitate engagement by encouraging students to invent whimsical Christmas friends, perhaps tying designs to storytelling prompts like 'What adventures will your elf embark on?' to boost motivation and differentiation for varied skill levels. Highlight key concepts of digital persistence and iterative design, while troubleshooting potential challenges like browser glitches by toggling fullscreen mode for better visibility in group settings. For effective delivery, circulate to offer real-world connections, such as linking character traits to cultural holiday traditions, keeping the activity light-hearted and inclusive to maintain enthusiasm.