these pencils. They are our very favourite in our house and we use them for so much. They give a beautiful vibrant colour and are easy to use and wash off furniture, walls and people really well ;-P
blanket stitch and coloured embroidery thread go around the outside of your crown stitching the two layers of felt together.
At the elastic on each side add a couple of extra stitches to hold it very firmly in place.
Now you have a beautiful rainbow crown.
Happy crafting :-)