John writes “Here’s how to make a device that is useful for visualizing the movement of small particles and for demonstrating slip planes, dislocations, defect holes, and the three states of matter. If you would rather not create your own, you can buy one for $50, but this DIY version costs about $8”. Link.
Devin writes “These pages are a nice guide to making high voltage items (toys?) out of trash! These two pages show how to make a Tesla Coil out of trash, and how to hook up TV flyback ransformers for all sorts of fun HV stuff (arcs, jacob’s ladders, capacitor-bank charging, coin-shrinking, etc.)” Link & Link.
Frank writes “Here are some projects, plans, rural skills, renewable energy, home CNC machine building, home/hobby metal casting, dry humor, tons of pictures…Since 1999 theworkshop.ca has evolved from a general interest hobby site to become an international Small Foundry resource…2005 marks the entry into the “Art-Casting” and “Industrial Proto-Typing” markets…Industrial Proto-Typing is a service that caters to the manufacturing sector through to inventors that want a single part or series of parts cast for a “Proof-of-Concept” application.” Link.
Greg writes “These guys took a girl’s prom glove, and attached an accelerometer to one finger. They also attached 4 buttons to the middle finger. They use an Atmel Mega 32 to interprate the signals from the sensors on the glove and to create the RS232 serial output for the computer.” Link. See previous “mouse glove”.
Geo’s Super-slim, cool-lookin, EMI-shielding wallet – “Ever get tired of carrying around a huge honkin’ leather wallet? Want to impress your hipster friends with your wacky style? Worried about your credit cards getting erased by all those stray electromagnetic fields you’ve been hearing about? Then this is the wallet for you.” Link.
Dhruv writes “This page has great animations that break down the complicated process behind creating a single transistor (the basic building block of almost all computer chips).” 
This little robot car from Nakamura-san at Himeji Soft Works in Japan drives around then it transforms into a real robot and walks around. I want to build one of these or buy one immediately. [