Here is the post I promised showing the end result. I don't have pictures of every single magnet or bookmark made, but this is a good representation of the variety of pictures I chose to use. While this is a photo-heavy post, I'll try to keep the verbiage to a minimum.
First of all, I cut out lots of pictures (narrowing down what pictures to cut out was the hardest part):
Before laminating, I used a glue stick to glue pretty (or coordinating) decorative paper to the backs of the pictures. When possible, I also cut out and glued on the reference information for the pictures and artists):
Excuse that everything above is already laminated, I didn't think to take photographs before laminating.
After each picture had backing paper, I laminated everything using an inexpensive laminating machine I bought years ago at Aldi, of all places.
Note: I was in Walmart yesterday and I noticed that they sell laminating machines that are comparable to this in the price range of $10.00 - $20.00. Such machines are cheap, but the laminating sheets are moderately expensive. I used 3mil thickness laminating sheets, which was perfectly fine for my purposes. While I was in Walmart, though, I picked up some 5mil sheets - more expensive, but I'm curious how much thicker and stiffer they will make items like this. We'll see.
After laminating the pictures, I cut them out with scissors, and to the backs of what I wanted to make into magnets, I glued a variety of magnets:
I do suggest testing the strength of these types of magnets. I'm afraid at least one of the ones above was pretty weak. I learned this too late. It still worked, it was just a bit less strong, magnetically, than the others.
I glued the magnets to the backs of the laminated pictures using E6000 adhesive (purchased once upon a time at Hobby Lobby):
And some of the laminated pictures made terrific bookmarks:
One could punch a hole in the bookmarks and tie a decorative ribbon on, but I like the simplicity of these.
And that's all there was to it! Some made their way into the Advent calendar project I made last week, and some I've saved for myself!