Today we printed emmett's Penrose Snap Tiles on Thingiverse, which are a genius-level modification of the already awesome Penrose P3 Tiles by pleppik. The genius is the excellent snap-together design that at the same time enforces the matching rules for aperiodic rhombic Penrose tilings. The tiles print up in no time with just two layers around the outside, and snap together surprisingly securely. You could quickly decorate an entire wall with these tiles!
Thingiverse link: http://www.thingiverse.com/make:73765
Settings: Printed on a Replicator 2 with custom profile based on the Low PLA script, with 0% infill, no roof, no floor, and two shells.