To achieve this, the discs were 3D printed, along with a central housing containing two 12 volt gear motors. 3D printed gears are used to allow both discs to rotate about the same axis.

But that movement is an illusion. And it all relies on ... And everything starts with these tiny 3D sculptures. Each is 3D printed and painted by hand. And all their motions are mapped out using ...

D-printable, musical fidget toys that play classic video game tunes. Of course there’s the classic Super Mario ditty, but there’s loads more. How ...