Opening and closing cereal boxes, cookie packages, books, etc. with letters, numbers, pictures printed on them.
Is one allowed to knock on the door with the key, knock on the window, use an electric bell, and have a little bell...
Setting a Mouse Trap on Shabbos;
(Squeezing materials.) the correct procedure in reference to wiping up spills on a counter, table or floor with a towel or rag;