We do nappy free time on a plastic splat mat that you can buy to put down under the highchairs for messy eating time!! I find that works well and on top of it I put a terry flat nappy over it so DD's skin isn't directly on the plastic. But now she's more mobile and rolling around and crawling on her tummy but not proper crawling yet.... i'm starting to take her outside to sit out on the grass on a blanket or something or a beach towel. That works well.... usually only had wee's during NFT but once we had a big dirty poo! that she decided to play with haha