Basically you will need the same items as with the other coasters
4- 4x4 white tile coasters
clear acrylic spray paint
a paint pen, I used black but there are a plethora of colors to choose from
Start by cleaning off your tile with a dry cloth. Follow the directions on your paint pen to get it ready to paint.
Now draw away. You can put whatever you want on them. I just decided to do their initials in a different style on each coaster.
Take them outside and give the a spray with your clear acrylic paint. Do three layers, letting dry between each layer. This will make them waterproof.
Let the dry completely. Add your felt circles to the back and thats it!