Icosidodecahedron | 1632 Neodymium Magnetic Balls @ledwatchman

Icosidodecahedron | 1632 Neodymium Magnetic Balls @ledwatchman

Uploaded November 2010 | Updated September 2026, 1 hour ago

See my tutorial for building this shape here: youtube.com/watch?v=GbuRXA0O67w
This is an interesting variation on a dodecahedron (12 sided pentagon faced solid) with 20 extra triangular sides, I left them hollow because it kind of looked cooler.
The faces are reinforced so the whole thing is quite stable and strong even though it is hollow, took me several goes to get the construction technique right.
I used (111 x 12) + (15 x 20) = 1632 5mm gold neodymium ball magnets.
The technical name for this geometric shape is an icosidodecahedron:
en.wikipedia.org/wiki/Icosidodecahedron
Music track is Prelude No. 21 by Chris Zabriskie, from the YouTube free music library.

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

Prelude No. 21 by Chris Zabriskie is licensed under a Creative Commons Attribution license (creativecommons.org/licenses/by/4.0/)
Source: chriszabriskie.com/preludes
Artist: chriszabriskie.com

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$7 Assorted Sphere Designs | Tutorial | 480 to 1440 Neodymium Magnetic Balls This is my 100th published video, and my 99th magnet shape video (as one of my older ones was of an LED watch collection). A big thank you to everyone who has viewed, liked, and commented on my channel and videos over the years 😀 This is my longest ever video, an all-in-one guide to building 7 of my favourite different spheres that I have discovered working with neodymium magnetic balls. The spheres are all related by icosahedral geometry, that is, variations on the 12 vertices and 20 faces of an icosahedron, yet they look quite distinct from one another. There are a range of numbers of magnetic balls required, to suit different sized magnet collections. Spheres 1, 2, 4, 5 & 6 appear in my other videos as hemispheres in a cluster of 12, and sphere 3 has appeared in my Expanded Perfect Sphere video, but not how to build it. All subunits should be built with the same polarity (that is, with the same direction of winding from the same end of the same line of magnets), except where noted below. Also - turn on subtitles for this video to see added onscreen details of how to build each shape. 1) Hollow Icosidodecahedron Sphere - 480 balls 0:20 20 interlocked double layered triangle/hex pieces required, of 12 × 2 = 24 balls each. See here for my tutorial video using this design in a bubble cluster of 12: https://www.youtube.com/watch?v=ml0f_VDJVEo 2) Hexagon/Triangle Duo Sphere - 720 balls 1:15 12 sets of 5 rings of double hexagon rings, (12 × 5 × 12), the bottom ring of each double ring pinched into a 6 ball triangle. See this design used in a tutorial for a bubble cluster of 12 hemispheres here: https://www.youtube.com/watch?v=aQ05k-8OHCQ 3) Double Hexagon Sphere - 1020 balls 2:07 80 double rings of 6 (12 rings of 5 double rings = 60, + 20 more to fill the gaps between rings of 5 double rings of 6), + 12 rings of 5 magnets for the vertices (12 × 5 × 6 × 2 + 20 × 6 × 2 + 12 × 5). See how to expand this design to build a much larger and highly spherical sphere here: https://www.youtube.com/watch?v=cZuElEtqvn0 4) Seamless Modular Icosahedron Sphere - 1116 balls 3:46 The pentagonal pieces must interlock with triangle/hex pieces of the opposite polarity, but you can just turn a triangle/hex piece over to change its polarity. The pentagonal pieces should all be made the same way, but in the opposite direction of winding to the triangle/hex pieces, or in the same direction from the opposite end of the same line of magnets. 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Icosidodecahedron | 1632 Neodymium Magnetic Balls