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Some Quick Ideas

knock sensor (easy) ultraviolet pen with LED lights reading hidden messages LED Throwies Vibrating toy – rip apart an old toy and let it move LED Eyes in a robot – Cylon or KIT Light sensor and alarm for fridge…

a “hack” is a clever shortcut or a lesser-known, faster way to get something done. A hacker believes that information-sharing is a powerful positive good, and that it is a hacker’s duty to share her expertise.