There’s a couple different ways to do it but it all is based off of left and right and calming your brain. The way we do it is with some little buzzy devices one in each hand and the buzzes alternate. It’s supposed to help calm you and process stuff like trauma and anxiety.

Since COVID we’ve had to do video calling so we do alternating arm tapping.

I’m not quite sure how to describe it.

Eye movement desensitization and reprocessing - Wikipedia