Qball by Benoit
Benoit’s Qball is a cute little printed-plastic-and-rubber-band creation that snaps back into semi-spherical shape after being deformed. 1 This little gem makes use of only two different printed parts2 plus a number of rubber bands, so it could probably be built into an arbitrarily large springy structure. I like this one because strikes me as a great conversation starter or desk fidget toy.
Error - could not find Thing 4645.