3-D printed from ecologically-friendly plant-based (sugar cane) material, this finger-labyrinth ball  comes in a box with instructions included. Also available in blue/green (Earth) and glow-in-the-dark white (Glow)

The 4-circuit  wrap-around labyrinth has taken 18 months to design  and each 7cm ball takes 15 hours to print, hence the relative expense.