🛠️ Cardboard Ecosystem Prototype Build

In teams, students create a low-fidelity tabletop ecosystem using cardboard, paper, sticky notes, and recycled materials. They include at least two plants and two animals with temporary labels explaining one internal and one external structure for each organism. At least one animal must include a simple flap or arrow diagram showing stimulus → sensory organ → brain → response. Teams photograph Version 1 and begin an iteration log.