Wired computer mice might seem archaic, but they're incredibly easy to use. Instead of having just the conventional buttons, this mouse also has side buttons.
From Overclockers
Glorious Model O 2 USB RGB Optical Gaming Mouse - Matte Black (GLO-MS-OV2-MB)
Conrad Electronic
Glorious PC Gaming Race Model O 2 Gaming mouse USB Optical White 6 Buttons 26000 dpi