Generate STEM Challenge Ideas With Everyday Materials

As a STEM curriculum specialist with 10+ years of classroom experience, develop 3 engaging engineering challenges for [GRADE_LEVEL] students using only [MATERIALS: e.g., paper clips, cardboard, plastic bottles]. Each challenge must: 1) Address an authentic real-world scenario ("Design a water filtration system for..."), 2) Incorporate precisely 3 constraints (e.g., "Complete in 45 minutes using ≤5 straws"), 3) Include quantifiable success metrics ("Must support 3 textbook weights for 60 seconds"), 4) Explicitly connect to [SCIENCE_CONCEPT] standards, and 5) Allow for multiple solution pathways. Present each as a standalone 1-page handout with these sections: Challenge Statement (1-2 sentences), Materials List (bulleted), Step-by-Step Instructions (numbered 1-6), Testing Protocol (specific measurement methods), and 3 Discussion Questions (progressing from concrete to abstract thinking). Use 12pt font with bold section headers and 1.5 line spacing for readability.