Heath's Deciphering Dice | Complex Math Magic Trick string games Half Hour Cube is a

Half Hour Cube is a handcrafted wooden 3x3x3 cube brain teaser designed by Stewart Coffin in 1975

The pieces are precision laser cut and engraved from 1/4" thick hardwoods

keychain attachment

The right side gear is the English Text wheel

You can see the marble at various points through the holes in the case

Heath's Deciphering Dice | Complex Math Magic Trick string games Half Hour Cube is aHeath's Deciphering Dice is a captivating blend of magic and mathematics. First introduced in 1927 by Royal V. Heath, this remarkable trick uses five laser engraved dice to perform mind blowing feats of mental math. With over 7,700 possible combinations, the magician can instantly reveal the sum of any roll, leaving audiences amazed. Features & Details Includes 5 laser engraved wooden dice Comes with a handcrafted wooden case (5. 25" x 2. 5" x 2")