Link a follow-up prediction to earlier evidence, then keep the new comparison fair. If the first results are unclear, check the method rather than pretend you found a pattern. Safety: Adult low releases only; no throwing, climbing, fans or stairs. Stop: End after six paired releases. Never increase height, add weights or repeat just to force agreement.

Materials: Three equal paper sheets, ruler, paper and pencil; Adult partner and clear floor space 1. Test two equal sheets, one flat and one folded once in half. An adult releases them together without pushing over a clear indoor floor. Align their lowest points 50 cm above the floor. Repeat three times and record landing order, tie or uncertain, plus release problems. 2. Read the first results. If one shape usually landed first, predict whether a third equal sheet folded twice will beat the once-folded sheet; explain the evidence link. If results were unclear, predict that matched releases will clarify the original comparison and plan a method check. 3. Write the follow-up plan before testing. Identify shape as the changed variable for a new-shape test, and landing order as the observed outcome. Keep sheet type, starting size, lowest-point height and release method the same. For a method check, keep both original shapes. 4. Carry out three paired releases for the chosen follow-up. Record every result in a separate table headed Follow-up, not in the first table. Keep uncertain events visible. 5. Compare the new observations with the written prediction. State matched, did not match or not clear. Explain what the follow-up adds and why it does not prove that more folds always means faster falling. Done: Two actual three-trial tables are linked by a recorded prediction and a fair follow-up plan. Proof: Keep both tables and the intervening prediction. Note adult releases and any method-check branch. Stop: End after six paired releases. Never increase height, add weights or repeat just to force agreement.