- Normalize failure: “Engineers expect breaks and rebuilds—that’s normal. ”Use the mantra Break → Breathe → Rebuild.
- Use a visible timer with checkpoints (“Half time—check your base!”).
- Encourage reuse: broken spaghetti pieces can become braces/supports.
- If teams get stuck, ask: “What is the smallest change you can test next?”
- Make stewardship visible: each team keeps a “reuse pile” and “waste corner
- Noise/chaos: Use a quick signal (“Scientist hands!”) for freeze + reset.
- Unequal participation: Role cards + rotate roles between Trial 1 and Trial 2.
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