Mr. Davis's robotics warm-up scored a toy train bridge on challenge card #70. Each criterion is 0-4 points. Rubric (0-4 points each): Waterproof; Durability; Comfort; Eco-Friendly. Scores: Waterproof 4, Durability 0, Comfort 1, Eco-Friendly 2 (base total 7). If a design leaks during the water test, subtract 2 points.