Harry writes "For every blockbuster of the mouse world (such as Microsoft and Logitech's big sellers) there have been countless mice that flopped, or never made it to market. Mice shaped like pyramids; mice shaped like Mickey; mice that doubled as numeric keypads or phones. Even one that sat on your steering wheel. I've rounded up some evocative patent drawings on twenty notable examples."

The famous Seattle "gum wall" outside the Market Theater at Pike Place Market has the honor being number two, on the "Most Unsanitary Attraction" list released by TripAdvisor. Starting in the 9'0s, people would put their gum on the wall while they waited for tickets. The city cleaned the wall a couple of times, but soon gave up, and now it's a tourist attraction. The disease-ridden mouths of those seeking the gift of eloquence pushed the Blarney Stone into the number-one spot. Strangely absent from the top 10 list was the Dexter office's barrel of half-empty soda and coffee cans. We'll do better next year.