The rules are the same as for the normal, cubic Brain String. Move the pins with the strings along the cuts in the puzzle surface until the strings are knotted inside.
Then bring it back to the original, unknotted state.
Inventors: Guido Lap & Oskar van Deventer
Size: height 9cm diameter from square to square 8.5cm between hexagons. Add about 2cm for each pin.
External LinksRecent Toys: Brainstring advancedhttp://www.recenttoys.com/index.php?id=48