RT Brainstring "R" logic game

The Recent Toys Brainstring "R" is a logic puzzle enclosed in a sphere. Elastic strings are stretched across the inside, and rotating the sphere's segments along its vertical and horizontal axes causes the strings to tangle into knots. The goal is to untangle them so that no strings touch one another.

The puzzle is simple to understand but demands patience and spatial thinking, since every turn of the two halves in opposite directions changes the pattern of the tangles. With practice, you can also shape symmetrical knots and striking figures inside the sphere.

This compact toy works well as a quick brain teaser and as a small gift for puzzle enthusiasts of all ages.