These dimensional hot mats have been around, and very popular, for a long time, but they were fairly labour-intensive projects. Now Plum Easy has made it, well, plum easy to make a batch of them, thanks to their pre-printed foundation sheets -- no math, no measuring, no worries. A simple fold-and-position technique builds the mat quickly and accurately, resulting in stars that are perfectly aligned and a table that is perfectly protected! Makes a great gift.