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Kensington Announces Availability of Award-Winning, Thumb-Operated Trackball Designed for First-Time Users | Business Wire
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Nulea M501 Wireless Trackball Mouse, Rechargeable Ergonomic Mouse, Easy Thumb Control, Precise & Smooth Tracking, 3 Device Connection (Bluetooth or USB), Compatible for PC, Mac, Windows, Android: Amazon.co.uk: Computers & Accessories
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One of the first “computer mouse” (trackballs) was made from bowling balls « Adafruit Industries – Makers, hackers, artists, designers and engineers!
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