It&#x27;s literally impossible to perform the activity as specified in this lesson plan (in a normal classroom environment). Inserting your hand will cause some exposure of the inside of the bag to air.<p>Also: &quot;Heresy kisses&quot; -- Nice proofreading. Damn good thing this lesson plan isn&#x27;t meant for students to view directly.<p>Is it too much to ask for commercially-supplied teaching tools to go through a basic quality control process?