The clear base allows teachers to place them over colorful spinner bases found in textbooks and worksheets. You can draw directly on the spinners using a dry erase pencil to create custom games or specific probability experiments. We meet at 3520 Rayford Road in the parking lot of HEB near the gas pumps (Grand Parkway and Rayford Road), cash only. For additional items for sale by us, click on the "more ads by this seller" link to the right of the picture.