Bamboo is the fastest growing plant on the planet. Bamboo groves release 35% more oxygen than the equivalent number of trees, so planting it helps fight global warming. It also happens to look great when made into a puzzle. And by adding 'zlers' to the end makes the word "Bamboozlers' - a great name for a range of puzzles!!! This set is made up of 2 classic designs which come together nicely to form an accessible, yet extremely difficult set of bamboo brain busters.