The instructions I used are no longer available on Pinterest, so I found a similar set of directions that you can use if you want to try these. Click HERE for the how-to's provided on the blog "Recycled Interiors".
I started with some 4X4 inch tiles that I found on Amazon. You can definitely find these at home improvement stores as well.
When the Mod Podge was completely dry, I used a clear acrylic sealer spray to seal them. And this also caused some bubbling! Ack! Again, I waited 24 hours between each additional coat of sealer, ending up with three coats. If that sounds like overkill, I reasoned that I wanted these to be very durable.
I would recommend this project. Think about how many other kinds of paper you could use to make these - wrapping paper, origami paper, or scrapbook paper. Just think of the possibilities to craft some really unique coasters!
If you decide to make some of these, I'd like to see your finished product!