I bought one of these kits at the Sewing Expo in Seattle a few years ago... It was pretty and fun but I kind of lost interest after the first one and never used it again. The result was nice - the foam was thicker, maybe 3/4" if I remember right. Foamcore would not work as the finished top would make pressing the fabric into it difficult. Something more like a floral foam block is the right consistancy. I'll look & see if I still have the instructions...