Interactive school project involving students' drawing and projection

Hi all,
I’m struggling as beginner to find a way to create an interactive projection. Basically I’m trying to create a motion tracking experience through regular webcam where students can manipulate through gestures their own drawing projected on a wall.
I know of a particular art project where children scan their drawing and are displayed on wall in real-time for them to interact with.
Any tips or examples of how to use scanned drawing in touchdesigner and plugins / components i can use maybe would be very welcomed.
Thank you