This is a movie showing the spin art unit I made and how I use it on glass. I buy old glass windows and cut the glass into different shapes. The spin art machine was made using a motor and foot control from an old sewing machine. The case is out of 3/4" plywood overall dim. 27" x 8" high. On the glass make sure you only use 1/8" thick glass. If the glass has stenciling on it its tempered and can't be cut. On the aluminum slides to hold the glass is a 1/8" slot to hold it down. My wife likes it the most if you put paint on when its stopped then spin at a slow speed. By the way the paper ones are for the school kids to do at the library.