I think the ultimate test to see how intelligent someone is, is to play Monopoly with them, and once they stop on a railroad and say "No, I think I'll save my money, I hate railroads", you'll know just where they stand, hovering on the line of retardation. Everyone knows you always purchase every property you land on. The monopoly board coasters are coasters that are made from actual monopoly boards and are a sure fire way to let everyone know that you will beat them at Monopoly and it won't take the normal 4 hours to finish a game.
The Monopoly board coasters are hand cut and covered in contact paper to keep them waterproof, with the edges covered in mitered duct tape, and the bottom covered in cork to give a little padding between it and the table. Each coaster measures 3.5 inches x 3.5 inches and you will receive a set of 4 coasters in a random assortment of corner pieces and possibly property pieces which you unfortunately cannot pick yourself.