Totally Cool Coasters!

One of my students, Lisa Donnelly, sent me this image of coasters she is making using glass tiles from Home Depot and her Zentangle Tiles. 

She said that she sprays the tile with a sealant, such as hairspray and then uses modpodge to adhere and seal the tile to the glass.  She then cut some felt and glued that to the back of the glass.  I think these are totally cool and would make great gifts!