WATCH: The spin cube on a key ring that could rival fidget spinners

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An ambitious designer who hopes to compete with fidget spinners has invented a more compact and transportable version - which can fit on to a key ring.

Andy Lewis, 58, previously worked as an electrical engineer but for the last few years has been working as a 3D designer.

The spin cube

The spin cube

He says he developed almost 20 alternatives to the fidget spinner in recent years before he settled on his Spin Cube contraption.