Make flexible, reusable craft molds from gelatin and glycerin. The tutorial explains how to cast small details, use the molds ...

Cook cornstarch, school glue, vinegar, and oil into smooth white clay for textured ornaments, molds, and decorative pieces.

Building a one-off prototype is usually pretty straightforward. Find some perfboard and start soldering, weld up some scrap metal, or break out the 3D printer. But if you’re going to do a production ...