Scratch

I wanted to make a cosplay video of the Kagamine Rin and Len song, "Black Cats of Halloween" and there's this one part that I can't figure out how I would cosplay.

Basically, Len is conducting these cute little ghosts and skeletons who are playing trumpets and drums and stuff while Rin watches. HOW DO I DO THE GHOSTS AND SKELETONS ASDFGHJKL

Anyway, I'm open to suggestions as to how I should cosplay this- I'm completely at a loss and I might just end up having Len conduct Rin playing a trumpet or something ; u ; Thank you~

Also, have you ever done a cosplay or cosplay video? What was it for?