My neighbour Jo liked my domino covers but wanted something round. I had a few perspex coasters that needed some tlc. Once sanded, and painted they offered a lovely smooth surface to stamp on. It was a bit hit and miss with the one on the left as the stamp I used is oblong! The oriental tree design was a round stamp. I'm hooked on these too now and found a box of 11 coasters in the charity shop today for just a £1 - yipee!