The final product is deceivingly simple: a collapsible, 10-inch-long, hand-powered inhaler made of plastic and metal that weighs 4 ounces.
These include the increasingly popular 3.5mm pass-through jack (so friends can plug in and share your music), a collapsible design, a detachable part-coiled cable and in-line remote.
The PlayPad is a travel-sized tablet controller with dual analog sliders, and includes a collapsible tablet stand and carrying case for console-like precision gaming on the go.
ENGADGET: Nyko Free Fighter joystick brings flexible controls, arcade flair to the PS3
Teens design pedal-powered filtration system: High-schoolers Payton Karr and Kiona Elliot , from Oakland Park, Florida , led a team of inventors who designed a collapsible, transportable, bicycle-powered emergency water-sanitation station that filters E. coli and other harmful pathogens from contaminated water.
It flies too fast to be hand-launched, so it ejects out of a thin tube with collapsible legs that a soldier can set up in an instant.
Some shoulder-strained road warriors might replace their heavy laptop with a PDA-phone, collapsible keyboard and micro-projector.
Sleek and chic with a touch of retro cool, the Navigator has collapsible earpads, shiny metal casing, mock-leather touches and a detachable cord with microphone to make them feel pricy.
In Port-au-Prince, a chaotic scene erupted as people clamored to reach the trucks of a World Food Programme convoy carrying water purification tablets, plastic sheeting, collapsible jugs and nutritional biscuits.
In back, the collapsible zoom lens, xenon flash, and aluminum battery cover mimic a point-and-shoot camera.
ENGADGET: Aigo A8 / Leo 14 megapixel cameraphone hands-on (video)
Some of the other firefighting equipment founded in Chicago is less high-tech: the snorkel truck, the fire plug or hydrant, the collapsible fire escape and the fire pole, which was invented by a Chicago fire captain in 1874 so firefighters could slide quickly to the ground floor.
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