More Polystyrene Projects

I made two more styrofoam house stands that we'll use for the village scenes. They are not that good b/c this is my first time doinf stair cases. It's definitely something I'd like to practice at...and see what else I can think up.

I've been spending a lot of time on the internet trying to find inspiration...what techniques are other people using. What else are they carving besides stair cases?...What are they using for paint and how do they protect the pieces? I'm working on making a glacier for the Antarctica display. What's the best way to glue the sheets of styrofoam together?