For Kaye-Kaye & Tigger,
Take a 10" square, place face down ( you wont see this piece on finished project), then place your heat resistant square on top, then another 10" square ( everyone will see this square). Fold The remaining 4 X 10" sq's in half & iron them flat. Layer them, placing finished edge to the centre, raw edges to the outside.. Use plenty of pins as there are 7 layers & they could slip under the machine. Check back of fabric is all the way to the edge. Clip corners, trim excess bulk.
Turn inside out, use blunt tool to help. And....VOILÉ!!!!