A local community group, Sustainable South Bronx, would work with at-risk high school students to manufacture a new type of dry-laid soil-cement landscaping block for retaining walls, benches, and counters. The top and bottom surfaces of these blocks would have a sloping, undulating ruled surface that helped them stack and lock together. Three types of block (straight, curved, and half-curved) could be combined in different ways by enterprising "do-it-yourself" visitors to PS1, who would be free to build various structures on the "forest floor".Small independent ceramics manufacturers from Jingdezhen, China, (the millenary porcelain capital of the world) would fabricate glazed, slip-cast blocks for the grotto. These three dimensional blocks were the result of slip casting studies on spheres (as voids) packing and sectioning, that resulted in a number of different building units options.