My favorite project: Happy FLY_ Happy OR Unhappy
Happy Fly is my favorite physical computing project (now). It consists of two LEDs and one photocell. It has two functions. First you can put it in a dark place. It will keep quiet. If you shine a flashlight on it, it will start to sing a happy song. Second, you can also put it in a bright area. It will keep singing. If you fell annoyed, you can use a swatter to hit it. Then it will be very quiet.
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