We picked 6, and since we don't really have much use for pins I decided to make them into magnets. FYI: this is probably the easiest DIY ever.
There aren't many tools needed really. Just pins, bare magnets (you can get them at any craft store), and some Mod Podge.
1. Take the back out of the pin and put a drop of Mod Podge onto the pin.
2. Stick the magnet onto the back. Wipe off any excess glue.
3. Let dry, hang up, and ENJOY!
Happy Halloween friends! :)