Fingerprints; invisible ink; writing on one skin; x-rays.
(Temporary Ohel) What is the halacha when some SCHACH fell down from the roof of the Sukkah;
is one allowed to wear glasses on Shabbos when the lenses change colors in the sun and indoors?
Making or Undoing a Ponytail, Braiding a Doll's Hair or Wig, and Scratching One's Head with Fingernails;