This is a very simple level of interactivity, which enables you to use any switch plugged directly into the base of the bubble tube.
When no switch is plugged in, the lights cycle through the 8 bright colours, fading gently between them.
Plug a single switch into the 'step colour' socket and each time you activate the switch the colour will change.
Plug another into the 'on-off' socket and the bubbles will stop and start with each touch of the switch.
Plug a Nine Switch Keyboard into the 'step colour' socket and you can choose any colour directly and even touch two colours to colour mix. You can also switch the bubbles separately.