חסרון כיס Chesron Kis: A Blank Check, Scrap Paper, Graph Paper, Typing Paper, Etc;
(Squeezing materials.) how to work with various types of brushes on Shabbos. (E.g., toothbrush, baby bottle brush, etc.);
Introduction to the Concept of עובדא דחול (Uvda d'Chol) in Relation to the Melacha of M'AMER;