Yet there is another reason to construct something ourselves: To learn, just as [Fraens] has done with this 3D-printed generator. (Video, embedded below.) [Fraens] starts off with a jig for ...

That's the idea behind one Reddit post that proposed building a citywide scavenger hunt in San Francisco with hundreds of 3D printed toys. The man behind the post is Ben Baltes, a 25-year-old ...