It's genius from every angle! The classic slide puzzle has become infinitely complex. Angle each mirror to reflect the side of an adjacent cube and create one complete image: Einstein's head or a mirror that reflects your genius face, with a small Einstein in the middle. In theory, this may seem relatively easy, but you'll be pulling your hair out in the end!
It's so Knotty! Building on the success of the original,
this advanced version adds more sides, colored strings and easy to grasp rubber tips. More challenging than the original, Brainstring ...