"צביעה באוכלים" (coloring in foods) - the stringent view of some poskim
Fruits Which Fell Off a Tree on Shabbos or Before Shabbos. Eating One Fruit at a Time;
Hanging up a Child's Swing, Cutting off Part of a Candle to Fit into the Candelabra on Yom Tov, Cutting Part of the Wick...
(Melting ice.) freezing dry foods; freezing ice pops; automatic ice makers; freezing liquids not to lose taste or not to get spoiled;