Layers, Slides, or lightboxes

So in real world terms, I'm imagining doing this, and I picture myself in a before computers world. I picture my elem, (or HS, or college) students sitting down to a table with 120 pictures on it, and I wonder,"Who cut out all those pictures?" My answer is "Not me! I only have a semester for this class, not forever." I wonder how big a table I need, and how long it is going to take to choose from that many pictures. I might get those pictures and bits of text cut out if I had a  grad student that wasn't worth anything else, or a paid para that didn't have anything to do, but ultimately, I will get around to wondering if this much work is worth the value the students are going to get out of it.
And that's a valid question, whether you are doing this project with paper, or pixels. How much slide space do you have to commit to allow sorting through hundreds of pictures and bits of text? Is is going to be worth the resources it consumes?

Here's a proof of concept sample with seven options. It allows the choice of any combination of picture and text, but doesn't allow moving or rotating the choices. It allows the choices to be carried over to the next page. I guess its up to you whether you want to make the investment to finish it out.

I might consider five canvases but only by giving each one one-fifth of the choices. You could probably duplicate these two slides, and just change the pictures and text, and it might be doable.

Those are my suggestions.