TAP Silicone RTV Mold-Making System
CopyFlex Liquid Silicone Mold Making Rubber
Silicone Plastique
DIY Lego Ice Trays
Artmolds MoldRite 25
Smooth-Sil Platinum Silicone Rubber
Hobby Silicone
Make Crystal Clear Ice
Mold Making Minute: 2-Part Mold Star 15 Mold
Sparkfun
Make an acrylic box
How to glue acrylic
How to make a rolling ball sculpture part 2/9: soldering
Gravitram
Geneva wheel
Rube Goldberg design ideas
Theo Jansen
Reuben Margolin
Drafting a gear in AutoCAD
Mechanical linkages in the geometer's sketchpad
Mechanical iris
Perplexus
Archimedes - marble roller coaster
The price is right - plinko
Creepy pachinko documentary
Crane game