Tablet: Plug the red cord into the input device on the side. Since you are using a tablet, you may need to use an adapter to connect the USB wire to the tablet. Here is an example adapter for devices with a Ligthning connection. Here is an example adapter for devices with a USB-C connection. Plug the cord into the adapter, and then the adapter into the device.
Computer: Plug the red cord into the input device and the USB into the computer.
Connect either a commercial switch or a do-it-yourself switch to one of the audio jack ports on the input device.
Select one of the games from the Games tab to play. We recommend starting with a game that only needs one switch, such as Bluey Dancing.