The kids have been cutting shapes from their soft felt ready to add a background of more carded fleece and re-felt. There is a great felt makers list hosted by Pat Spark and there I learned how to cover the original collage with a piece of acetate which enables you to reproduce your exact design in felt pieces. If you dampen the felt pieces with soapy water they 'stick' in place while you add your background layers and re-felt.
I was lucky enough to find an old glass washboard a few years ago. It's been in my cupboard ever since waiting for a jolly felt making outing and today's the day!