Sorry hamsters, these are plumbing drain and vent pipes, not your fantasy Habitrail.
Most of the framing is complete, so the rough-in plumbing has begun. Electrical will start next week.
Angel and I ran the HVAC PVC 3" intake and exhaust up through the 1st floor bedroom to the 2nd floor HVAC closet over the weekend. Now that the weather will be warm and sunny this week, we can pop another hole in the roof and set the PVC in a "pitch pan". Photos forthcoming.