What is this construction crew building?

Reno Madness?

What exactly is this construction crew doing? The Holiday Challenge continues! Prizes!

See the full image, and others HERE .
Best entries will receive an Apprentice HD subscription!

Contest details:
Create a holiday themed image using Houdini. Then post the results on the forum .
Or if you prefer, you can email them directly to support@orbolt.com

Here are some free holiday assets to get you going.
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