If you want to use larger buttons, you could try these [arcade buttons](https://www.modmypi.com/raspberry-pi/arcade/arcade-buttons/arcade-button-30mm-translucent-red/?search=buttons&limit=100) and accompanying [quick-connect wires](https://www.modmypi.com/raspberry-pi/arcade/arcade-wiring/arcade-button-quick-connect-wires-set-of-10-pairs).