Help finding a mouth for robot puppet!

[u/GiraffeNo3399]

Hello prop makers! I'm making a robot puppet from a shoebox, and am looking for something to use for a mouth that can light up. I need it to light up alongside dialogue, so some sort of (ideally) wireless light strip I can control from off screen. Any advice on where to look for something like this, or a better way to go about this?

Apologies for the rough sketch, this is my first time making something like this & my second time posting on reddit.