Using the creatures of the ocean,Suse MacDonald introduces young children to a variety of shapes.A shark''s tooth reveals a triangle,a dolphin becomes a crescent and a turtle''s shell contains a series of hexagons.'Using the creatures of the ocean,Suse MacDonald introduces young children to a variety of shapes.A shark''s tooth reveals a triangle,a dolphin becomes a crescent and a turtle''s shell contains a series of hexagons.'