This project is quick and easy. I think they have a really pretty vintage feel to them.
To create the chalkboards I used the following products:
Small metal sawtooth picture frame hangers
Once the primer is good and dry, spray with chalkboard paint. I think 2 to 3 coats should do it. Allow paint to dry completely before pulling off the tape. I found that my paint had bled just a bit, but scrapes off easily with your nail since it's in an area that hasn't been sanded or primed.
I picked up a package of the metal sawtooth picture frame hangers for about $1. I attached them to the back of the tray with super glue. Allow it to dry for a good amout of time before hanging. The tiny nails included with in the hanging kit (the ones you'd use to attach the hangers to a wooden frame) were the perfect size to hang these on the wall.