The Tuvaluan Dollar is the currency of Tuvalu - a small nation in the Pacific Ocean. Tuvalu has never had banknotes of its own, and has been issuing coins since 1976; these circulate together with coins of the Australian Dollar, which is also legal tender in the country, and to which the Tuvaluan Dollar is pegged.
The Australian Perth Mint issues a large variety of non-circulating legal tender coins under the authority of Tuvalu. Some of these are in the silver two-ounce format (abbreviated as 2 oz). Strictly speaking, they are not bullion as they are priced at a premium and are targeted at collectors who appreciate them for their artistic merit and collectable value and not just for their precious metal content.
This coin marks 50 years since the invention of Rubik's Cube.
The mint says about it:
Rubik’s Cube inspired a global craze. The aim of the addictive puzzle is to twist and turn its 54 coloured squares so that each face is uniformly coloured. With 43 quintillion ways to scramble the coloured squares, it has provided hours of entertainment for the whole family. Those who take it most seriously study techniques and strategies to find the solution as quickly as possible. The current "speedcubing" record for solving a 3x3 cube is an almost unbelievable 3.13 seconds.
The magnificent coin’s focal point is a representative model of a Rubik’s Cube. Plated in 24-carat gold, the unique feature rotates in recognition of the puzzle’s twisting and turning method of play. | 
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