Hermaphroditic Blocks (IPP23) by George Miller
8 blocks, each with male and female parts, must be conjoined into a cube with no "protrusions"...
22 years old, this puzzle is from IPP 23 held in Chicago, USA in 2003.
Puzzles are made to live in people's hands. Pick one up today! See all active listings here: metagrobology : the study of puzzles
Shipping by USPS, payment via Zelle, Wise, check or money order. If you have any questions, please ask them before bidding. :-)