"צביעה באוכלים" (coloring in foods) - the stringent view of some poskim
How Many Fruits Does One Have to Gather to Be חייב (Chayav). Gathering After Gathering. Fruits in the House;
What are the halachas of building and destroying in conjunction with כלים (utensils).
(Melting ice.) understanding the difference between "מוליד" and "נולד"; leaving out frozen items on a counter;