place a crumpled piece of paper on the mouth of an empty bottle and it comes outside when you blow air inside the bottle
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Materials Required: Bottle, crumpled piece of paper; Method: Crumple a small piece of paper into a ball of a size smaller than the mouth of an empty bottle. Hold the empty bottle on its side and place the paper ball just inside its
Explanation:
Materials Required: Bottle, crumpled piece of paper; Method: Crumple a small piece of paper into a ball of a size smaller than the mouth of an empty bottle. Hold the empty bottle on its side and place the paper ball just inside its
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