improving the Ground through SOSSAIR, Carpet Removal, SOSSAIR in Conjunction with a Faucet Filter, and Anything Related to Kitchen Cabinets;
(Squeezing materials.) introduction to the halachas of a "SPONGE";
Understanding "פסיק רישא דלא ניחא ליה" (inevitable results from one's permissible action whereby one receives no benefit from).