Reply To: Ping Pong on Shabbos Home › Forums › Shabbos! › Ping Pong on Shabbos › Reply To: Ping Pong on Shabbos November 14, 2013 2:50 am at 2:50 am #987259 Sam2Participant HaLeiVi: If we combined 2 of the answers (that it has to be inside a separate Guf and that it is invisible to the naked eye) maybe we have a strong Teretz.