Fleece makes a wonderful soft snuggly backing especially for children's quilts. Machine quilting on fleece creates a fabulous texture. It's economical too, as it does two jobs, backing and wadding, for the price of one. It's important to get the good quality non-pil polar fleece because the cheap stuff ages badly. But sometimes it is hard to find good quality fleece at the right price. Last month, I stumbled on a great UK site:
http://www.fabric-online.co.uk/ They have a great selection of colours and patterns. I ordered one day, they processed the order the next and I received the fleece in the post the day after that. I call that quick efficient service. The quality of fleece was fantastic too.