Produced by his recently formed tunnelling business, the Boring Company, Musk will sell “kits” of bricks, starting with one that makes it easy to build things from “ancient Egypt,” like replicas of the pyramids, the Sphinx, or the Temple of Horus.

https://twitter.com/elonmusk/status/978140940241059840

Announcing the venture on Twitter, Musk said the bricks will be “lifesize” and they’ll be bored through the middle, to save some weight, but still rated to withstand California’s earthquakes.

The Boring Company has long stated its ambition to find ways to recycle the bedrock it will be removing from its tunnels, with an emphasis on turning them “into useful bricks to be used to build structures”.