[Nick] is working on a prototype of a coffee table sand plotter that draws patterns in sand a lot like a zen rock garden. [Nick]’s zen rock garden uses a magnet to draw a ball bearing across ...

Tuan Nguyen is using a Raspberry Pi to power his 'Dream Weaver' table which draws pictures using a magnet in sand.

The table uses a Cartesian motion platform ... Other nice touches include sitting the craft sand atop a layer of faux leather, so the ball moving through the sand doesn’t make annoying ...