4 Fun DIY 3D Printing Projects - portable rail-gun, duplicate keys, aquatic car tires, customized doors

Here’s another round-up of some fun DIY projects that have been shared around the hobbyist 3D printing world recently, hopefully giving you inspiration to get involved yourself, or at least providing some comfort in these turbulent times as summer curdles into the sour light of autumn.

from 3ders.org - http://www.3ders.org