Moving Sand Pictures – Colored liquid with black sand, four types of white sands and fine glitter. The double strength glass is framed with quality cherry wood frames with cradle for the small "Sand O's" Collection. Air bubbles hold up the sand creating unique scenes with every turn, pictures may take from just minutes to many hours to finish a scene. The black sand is heavier than the white sands so the sands will never mix. Some of the sands are transparent and some opaque giving the pictures a 3-D effect.