A round building on a lot of towers is attacked by shiny spheres. It is quite sturdy, so it does not just collapse yet after the first hits.

It is built from 2140 planks similar to KEVA planks. Rendering took about 7 hours on my quadcore i7 2nd generation. Everything was built and simulated in Blender 2.63.

If you want to build this yourself, go to http://www.blender.org and download the software for free. There are plenty of blender tutorials here on youtube.