If you want to make a bunch of cute photo holders then you should consider use plastic animal toys for that. It’s very easy to turn them in such holders and they are usually quite cheap. You’ll need small but strong magnets, a saw, and a hot glue gun to finish such project.
The idea is to cut the animal toy in half and glue magnets to the both pieces of the animal’s body. That’s pretty much everything you need to do, so don’t hesitate to try this project out.