Assess students' ability to apply material-property knowledge to design and evaluate a small waterproof, insulated shelter for a toy: choose and justify materials based on waterproofing, insulation, durability and breathability; sketch or describe the shelter and explain how it protects against rain and cold; and propose a simple test (e.g., water pour, temperature comparison) with expected observations. Evaluation focuses on material selection, reasoning, practicality, and test plan.