Destructible Godzilla Town
Here's a concept for Burning Man: a small town you can smash to the ground. Ideally it would be self-lit, easy to break down, and easy to reassemble. Yoga blocks sounds nice, but finding large quantities of foam cheaply isn't easy. Falling 2x4s could be mitigated by a helmet, and a sense of adventure. :)
If we use guidewires and pulleys, we can build something that self assembles. It also allows us to easily build in gaps, requiring less material. Using PVC for spacers makes the whole thing lighter.
Individual LEDs would add to the city scape feel, and if we want avoid a ton of electrical work, maybe we can embed standard Christmas lights.
The weight of the wood alone will be significant, never mind the structure for lifting/assembling the blocks.