Adapt a lesson to zero-cost local materials

Adapt [ORIGINAL LESSON] to a setting with [AVAILABLE MATERIALS], [GROUP SIZE] and [TIME]. Preserve the learning objective while replacing expensive tools with safe everyday alternatives. Provide a setup list, step-by-step activity, facilitator questions, an assessment check and a fallback when materials are missing. Explicitly state where the substitute loses precision or changes the science. Return a one-page teaching plan plus a comparison of original and adapted evidence. Do not suggest unsafe household chemicals, electrical work or unverified demonstrations just to make the lesson exciting.