Understanding the concept of "הפסד" (paying for losses).
understanding the two views with "דרך לכלוך" (coloring destructively). (Wiping one's hands on a towel from grape juice, blood, pomegranate, colored ices, etc.);
Rolling Marbles, Nuts, and Balls Indoors and Playing with Kugaluch or Jacks on Shabbos;