Agree with other posters who say that it's just chit chat, I don't think they're really jumping up and down with excitement. I had a couple of weeks at home with the children this summer and whilst we did keep the place hygienic and regularly tidied up, it was never that tidy for long. There was little point wiping the grubby paw marks off the wall, but they irritated.
I've had a few days with them back at school before I start work again. It's kinda nice that they put all their toys away before bed, floors are cleaned, then it stays that way for a while. I've spent a little time sorting through some of that crap that has built up. The smudgy paw prints are the kids and dp's job this weekend.
That reminds me of a conversation I had with my dp when I returned to work, it wasn't only 50% of the regular daily houseshite he'd be doing. Yes a couple of times a year YOU, yes YOU, will have to go through that room, wardrobe, kids room (with them), clear it out of the crap, decide where the good stuff should go. YOU will also need to look around and think about what does need to be done, all by yourself, you're 40, you will do it.
I've done similar all my working life, you have some down time and decide to catch up on those boring, crappy "house keeping" jobs that get sidelined. Yes, they are chatted about by the coffee machine.