The pups tonight have a new area surrounded by visually pleasing toys. They fussed a tiny bit as they didn't know what was going on and then they explored and enjoyed.
Now all I have to worry about (I do each time) is to hope they find mom in such a huge space. They usually do not gain much during this stage as the expel so much energy walking all over but that's quite fine.
Be sure to check out the videos. I did get a few of them in their new area.