Amazon.com: Gikfun 12mm Waterproof Push Button Momentary On Off Switch 5 Colors DIY Kit for Arduino (Pack of 10pcs) EK1925 : Industrial & Scientific
Amazon.com: Universal 4 Key Push Button Switch Module Keyboard Board for for Arduino DIY KIT Universal : Electronics
Swpeet 10Pcs V-155-1C25 Micro Limit Switch Long Hinge Roller Momentary Cherry Push Button SPDT Snap Action Perfect for Arduino, Appliance and Electronic Equipment: Amazon.com: Industrial & Scientific
Amazon.com: Gikfun 12x12x7.3 mm Tact Tactile Push Button Momentary SMD PCB Switch with Cap for Arduino (Pack of 25pcs) AE1027 : Industrial & Scientific
10x Snap Action Button Micro Limit Switch V-15-1C25 AC 250V 15A for Arduino: Amazon.com: Industrial & Scientific