Spectre - The Einstein Tile (31min print)

Einstein problem - Wikipedia the Spectre tile is the answer to the math problem if there is a shape that tessellate only aperiodically. this model can be used as a teaching aid for kids learning tessellation in early grade school (key stage 1) the clearance is 0.15mm, they slide into place quite well. the print profile puts the engravings on the plate to make it print better.