The sand unity ceremony has become a very popular option with the addition of these coordinating miniature nesting vases and contrasting colours of sand now children can be invited to take part the mixing of the various sand colours is a fitting way to symbolize the new blended family that will result from this union although there are no set guidelines for this ceremony generally the sand is poured into the central vase in the following order 1 father 2 mother 3 children 4 father and