looking for an overhead(?) projector that projects original artwork

[Todd's keyboard]

I'm looking for a projector that can show original artwork. I'd like to be able to show my postcard collection to a group of people.

Is there a reasonably priced projector that will pick up positive images, and shine them on a screen? I think I remember that Kenner made a toy version of something like this.

What is the name, so I can start searching?

thanks, Todd's keyboard