My FI and I have opted to do a unity sand ceremony versus the traditional candle ceremony. Should it be handled the same way that candle ceremonies are? The mothers are the ones who usually light the individual candles for this, should the mothers also start the sand ceremony, by pouring a little bit of each color sand in the vase? Or does the bride and groom just do it themselves? PLEASE HELP MY WEDDING IS IN 25 DAYS!!!! AHHHHHHH.