Rubik's Snake

The Rubik's Snake, also known as the Rubik's Transformable Snake, Rubik’s Snake Puzzle, and Rubik's Twist, is a mechanical toy invented by Ernő Rubik. It was first released in 1981 when sales of Rubik's Cubes were near their apex.

Despite its name, the Rubik's Snake is not a puzzle, but a toy that can be arranged into many interesting shapes. It comprises 24 right triangular prism wedges that can each be twisted, but not separated. There are approximately 70 quadrillion (more precisely, $${4^{23}}$$) possible permutations.