The mattress in Poppy's cotbed feels as hard as a plank of wood (well maybe not that hard!!). It is a standard foam one that came with the cotbed. I'd love to make it more comfortable for her (so she doesn't want to keep coming into our bed). does anyone have a sprung mattress? Are they any good? Also, does anyone give their LO (under 1 year) a pillow? She has a grobag, but I reckon she may find a blanket more cosy. She doesn't look cosy in her grobag on her plank of wood.