The document describes a co-creation toolkit designed to aid in character design for a children's animation film. The toolkit was tested with children ages 8-12 at a summer camp. The toolkit uses a variety of activities to immerse, activate memories, and generate new ideas from participants. These include a movie night, questionnaire, story writing, drawing a character, and assembling a paper doll character. Results will be analyzed for patterns to inform the final character design. The goal is to understand the aesthetic preferences of the target audience for a royal character in a medieval-inspired film.