Summary

A simple bracelet that is easy to generate and slice, and that is not 100% rigid as many other bracelets on Thingiverse.

I could not print the bracelet of http://www.thingiverse.com/thing:6961 as there was an artifact in the middle, and then openscad failed to work with the scad file provided there. So I tweaked the scad file so generation would be quick.

Instructions

You can play around with the scad file on openscad as per the instructions of the original thing. The uploaded bracelet is done with the hull of 3 cubes. This compiles on my laptop in several minutes
3 sizes of the bracelets are uploaded, for small children (6min), children (6plus) and adults (large)
print with .2 layer height and full support. It might be possible to print this with no support if you use a big raftsize under it to make sure it keeps connected to the platform while printed. Let me know if you succeed in that :-)
although the bracelet is a bit flexible, it is less so than I had hoped. So it does break more easy than expected. A single break is not a big problem here however, as it makes wearing/removing more simple! Nevertheless, I plan to tweak it to test how to make it stronger.

Spiral on Torus Bracelet