[Design a cooperative playground game for Pre-K–Grade 2 that explicitly teaches sharing, taking turns, and calming down when upset. Include learning objectives tied to social-emotional goals; age-appropriate rules; a step-by-step play sequence; defined player roles (children and adult facilitator); concrete conflict-resolution steps with suggested scripts; required materials, group size, and estimated time; safety considerations and adaptations for mixed abilities; and a brief rationale linking the design to developmental milestones and assessment criteria for success.]