Ref: see Atomihedra Page 1Solutions: the EH2 EH6, EH8. AH2, NH2, AH3 video solutions are below.Description: Non toxic durable plastic, very sturdy. Pieces snap together in a satisfying manner. Six links can make any of the the structures illustrated here. A different kind of puzzle based on chirality. Six EH links $12.00, or two or more sets $10.00 each six link set.