Similar to Tim’s Vermeer’s trick, this simple to make project can help your students, allowing them to easily draw something from their phone screen. The materials are usually free: some cardboard and a CD case or other piece of transparent plastic.
The principle is that picture on the phone screen is partially reflected by transparent plastic. When you look from top, you can see reflected picture appears “on the paper”.
Rather than just copy the image, encourage your students to change it up in some way and make it their own.