To make an ice sculpture you will need to pick some water proof items to make the interior sculpture with.
After you place the items in the baggie or container fill it with water. Be sure that your yarn/pipe cleaner/string is partly inside the water and part of it outside
Set the sculpture out side in the snow / on your deck or porch. After it freezes remove the sculpture form the plastic baggie / container and hang it up. It will glisten in the sun.