SUMMARY: I love how friends have set up their puppy enclosures.
If you want your litter of puppies to grow up being unafraid of different kinds of surfaces, things that make noise, things that wobble or movie under them of various stabilities, random objects of various sorts, what better thing to do than to fill their environment with that in mind?
One friend posted a video of her litter in their playground. So much fun to watch! (Puppies are about 4 weeks old here.)
Another posted a photo of the playground, ready to go as soon as soon as their little legs and eyes can get them moving. All kinds of mini teeters, tunnels, things that make noise, that roll, that can be climbed (a little bit), different surfaces, similar thing to what's in the video. Lovely!