The laser scanner is tied to audio so it plays the light and dark things it passes over. They have a bunch of videos on the channel. [Scratching with Barcode Scanners](https://www.youtube.com/watch?v=39Jg-eQq3-s) [BARCODE-BOARDING in the barcode park](https://www.youtube.com/watch?v=xlOjmLeQe3w)