A classical puzzle where you have to spin a cross to separate pins I turnedi nto a 3d printable assemblyyou can use 4 6x16mm pins but I included a printable model of hte pins themselves in case you want to print htem too as well as the full assembly for referencealso in this version the riddle can be disassembled and assembled completely from singlepart halves since there is a sideways slit/dent to insert and extract the pinsit also includes a slightly more advanced version of the half which is a bit harder t oprint but has smaller tolerances and a pattern somewhat obscuring the separation lines making the riddle a bit harder