Introduction to the Melacha of Mechabeh (מכבה) (Extinguishing a Fire);
Understanding the Concept of Leaving an Item on a Tree from Before Shabbos into Shabbos. Some Halachas About Using the Side of a Tree;
Using utensils, items that open and close by folding. (E.g., folding tables, strollers, playpens, folding chairs, etc.)