Place chroma Blackwidow v2 into demo mode

i have RGB keyboards and a 1yo, she is obsessed with the pretty colours on my new keyboard and keeps trying to steal it, as a potential compromise, i pulled out my old blackwidow v2 for her to play with but i cannot get it to light up without a computer present, i read that the keyboard has a demo mode, but even googling explicitly for how to trigger the demo mode only gives solutions for turning it off and people complaining about it being stuck on. i understand from some reading that the device may not light up at all without being connected to a computer, obviously, i dont want to give a 1yo the ability to type random things on my computer but i am in a small house and the computer and the baby must share a room, no other way around it.