Building A Large Katamari From Octahedrons | 8400 Neodymium Magnetic Balls @ledwatchman

Building A Large Katamari From Octahedrons | 8400 Neodymium Magnetic Balls @ledwatchman

Uploaded April 2012 | Updated September 2026, 15 hours ago

A demo of building a bigger version of my favourite multi octahedron shape. This larger one uses 140 octahedrons, each one made of 5 rings of 12 balls, formed into octahedrons of 60 balls by pinching each end into triangles of 12. 7 of these are then joined into a tri-arm subunit, and 20 of these 7-octahedron subunits are fitted together to form the mega structure. Completed it has a similar 12 pointed form to the katamari from the Katamari Damacy game series.
Uses a total of 12 x 5 x 7 x 20 = 8400 ball magnets.
This shape works well as a magnet construction but geometrically it is only an approximation, because joined octahedrons do not form perfect pentagonal rings but leave a small gap. The magnetic force closes most of each gap however to still make a nice looking magnet shape.
Music was Equinoxe 4 by Jean Michel Jarre, now audio swapped for copyright reasons to Impact Prelude by Kevin Macleod, from the YouTube free audio library.

#ledwatchman #Neocube #Neoballs #Nanodots #ZenMagnets #Speks #Buckyballs #NingoBalls #CyberCube #KlikyBalls #howto

Impact Prelude by Kevin MacLeod is licensed under a Creative Commons Attribution license (creativecommons.org/licenses/by/4.0/)
Source: incompetech.com/music/royalty-free/index.html?isrc=USUAN1100617
Artist: incompetech.com

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