Brainstring Original comprises a transparant polycarbonate cube with 12 elastic strings.
The result: complex knots appear on the inside. Using an ingenius pattern of incisions the strings can be moved through the cube.
The main goal of the game is to switch the outside button colors, without creating a knot inside.
It seems impossible but with a bit of brain power it can be done! There are 14 puzzles to collect in the Recent Toys range.