How long does a knot have to be tied to be considered a "קשר של קימא". (Knot of permanence).
Is one allowed to knock on the door with the key, knock on the window, use an electric bell, and have a little bell...
Writing letters, numbers, images using chocolates, nuts, sugar, salt, licorice, etc.
Fruits Which Fell Off a Tree on Shabbos or Before Shabbos. Eating One Fruit at a Time;