Avoid water stains on your tabletops by providing guests with these clever domino coasters. Arrange two standard-size dominoes horizontally, resting them snugly along the side of a pair of vertically arranged dominoes. Repeat the pattern using a total of eight dominoes to create a 4" square. Flip the dominoes face down, maintaining their position. Cut a piece of cork tile into a 3½" square. Center and hot glue the tile to the back of the dominoes. A standard set of 28 dominoes will yield three coasters.