Do you pine for the days of yesteryear, when one could explore the inner workings of the phone system with nothing more than a soldering iron and bag of parts from Radio Shack?
Now you can pretend to relive the glory days of Phreaking with Phreak Box! Unfortunately, those tones wont do anything to modern switching equipment, but you can still have fun.
Phreak Box includes the most popular tone generating "boxes": of course, the famous Blue Box, as well as a Green Box, Red Box, and Silver Box.