Buttons and Bella have a new box. We seem to have a wierd standoff whenever there is a new box. At first they ignore it (which is odd, as if someone puts down a bag of shopping and they are around, they jump straight in), then when they've decided that it's safe (and I've tried a few different positions around the room to bate their interest), they start assessing what they can do with it!
This one seems to passed their assessment. Bella now uses it as a hidey whole and has started chewing, and Buttons likes to sit on top.