Hollow Cube collectible while its twin requires 45°

while its twin requires 45°

and develop a lifelong love for biology and the natural world

Discover colours and shapes

And if you're looking for a thoughtful and unique gift for friends or family

making it a favorite of connoisseurs who appreciate the quality of a premium candy bar

Hollow Cube collectible while its twin requires 45°The Hollow Series presents an intriguing, innovative advance in twisty puzzles. The no core puzzles movements are unlike anything experienced by even the most experienced puzzle solver. With a combination of inventive gameplay and stunning design, Meffert Hollow series are one part gift, one part puzzle, one part treasure!