- Beginner level: limit to 2–3 recipe options; provide sentence starters for hypotheses and conclusions; teacher provides wand base, students modify.
- Intermediate: teams test 1 ingredient variable + 1 wand variable; full data tables; compare patterns.
- Advanced: add environmental variables (shade/wind) or sustainability focus (eco-friendlier choices, minimal waste plan); create a short “teaching guide” for visitors.
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