Brain Block Heptamond / TBB05 1 case (48 pieces)

● Quantity per case: 12 - Just taking out the pieces and putting them back in the case is incredibly difficult. ・Try taking the pieces out of the case and putting them back in. There are over 100,000 ways to put the pieces together. Some say there are over a billion ways... The exact number is still unknown, but even with so many solutions, it's hard to find even one solution. Make up your mind and jump into the "swamp" of Heptamond.