[header] How to calculate pi by throwing frozen hot dogs [title] Select a food item to throw. [step] There are a couple of qualifications. First, it must be long, thin, hard, and straight, like a frozen hot dog, for example. 
Second, it must be a reasonably stiff item. Third, it should be somewhere between 15 and 20 cm (6-8 inches) long; the experiment can be performed otherwise, but read on, and you will see why this size is optimal.