Two Sided Folding Snowflakes
In nature two-sided snowflake are hexagonal prisms, columns or needle shapes probably too tiny to view with the naked eye. Some of the 2 sided snow crystal patterns here are designed from photographs of various interesting looking crystals. View photographs of actual 2 sided snowflakes in the National Oceanic and Atmospheric Administration's web site.
Snowflake patterns are paper cut-out shapes which are not only fun to make but useful to help introduce math concepts to children.