Thomas came up with this idea for a dog treat dispenser. He built it on the kitchen table using cups in various sizes, small bowls and a long string. After he had built and rebuilt it twice due to someone tripping on the string, he decided to draw a diagram of the dispenser -- so if it were broken a third time, he'd have a drawing to refer to in order to rebuild it. I'm not sure if this is his first diagram of something he's designed, but the drawing was so detailed that I thought it was a nice one. He had it all figured out -- the dog knocks over a small cup (the lever!) which then pulls the string taut causing a series of reactions. The end result is the treat falling off the table and within the dog's reach.
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