5x size giant wooden lego blocks. Made with a cheap Chinese CNC. The builder reports that his manufacturing time is down to 3 minutes per block. Yes, these stack just like normal legos.
https://s3-us-west-1.amazonaws.com/h...go_blocks1.jpg
https://s3-us-west-1.amazonaws.com/h...go_blocks2.jpg
More: https://imgur.com/gallery/6l8uJ