Opening and closing cereal boxes, cookie packages, books, etc. with letters, numbers, pictures printed on them.
Moving a Candelabra That Has Oil in It on Shabbos. Using a Dimmer on a Light on Shabbos;
Is One Allowed to Prepare from One Shabbos to the Next Shabbos?;
Understanding the Concept of Opening a Door or Window Right Next to a Burning Candle or Flame;