Fleece Making some new accessories, lets brainstorm!

I went to the fabric store today and there was a really great sale on fleece so I ended up bringing home half the store (I have no willpower ). So once I get everything pre-shrunk and wicking nicely I thought I'd make some tunnels and pouches and pillows and things. Does anyone have any advice or suggestions for me? I particularly would like to know what people use for padding in those little piggy lounge cushions. I was thinking of using polyester batting but I'm not sure if that would be sanitary long term. I'm looking for general accessory advice too, if you know of any good patterns or tutorials, or even if there's just one particular cage accessory that your piggies go crazy for I'd love to hear about it. Thanks guys!