Add some winter decor to your house this season and Make Your Own Snow Bottles. To make this winter craft, coat a couple of glass bottles in a few layers of grated Styrofoam, until they are absolutely covered.
Rolls of craft paper wadded up, then slightly smoothed out. Cut length to wall height & add extra depending how "deep" you want crevices to look. Tape undersides to each other (avoids gaping) and hang. Blue, purple, & gray for underwater rock/cave walls.