"צביעה באוכלים" (coloring in foods) - the stringent view of some poskim
Handling Girls' Braids on Shabbos: Making or Undoing Braided Hair;
Is One Allowed to Trap a Bee, Hornet, Wasp, etc. If It Is Bothering People?;
ממצוא חפציך (Mimtzo Cheftzecha): What Type of Instances Would Make These Actions Allowed to Be Done on Shabbos?;