Understanding the constructive and destructive part of it (mochaik).
Does It Have to Be Done for Immediate Use? How Should One Make Salt Water on Shabbos and Yom Tov for the Seder on...
Part #1. building - introduction to "בונה"
(Temporary Ohel) Movable machitzas. Working with protective gates on the top of stairs. A halachic divider put up in a bedroom;