🛠️ Prototype Revision Sprint One

Teams revise their low-tech future car using cardboard, clay, recycled materials, labels, fuel-system diagrams, and cost notes from earlier phases. They must apply the checked science claims immediately by changing at least one body material feature and one explanation of how the car is powered or how emissions are reduced. Each team updates a revision log with photos, sketches, or teacher-captured dictation that shows what changed and why.