I put a few objects in the pups play area the past few days.  A length of 6inch PVC, Spanky has almost moved into it.  Need to check inside whenever he appears to be missing.  I built a simple teeter for them.  (Check the photo gallery) Darla is on it the most.  They have all tried it, Darla just seems to be a regular on it.  I've had to line the inside of the play area with one inch chicken wire.  Darla and Spanky got very proficient at getting through the chain link.  Largo and Gruff would manage to get their heads and one shoulder through the wire, Spanky and Darla just found a way to get all the way through.

They are trying to eat more solid food, Lorelei is only interested in visiting them a couple times a day now, and she has almost completely stopped cleaning up behind them.  They each have their own space to eliminate in the play area, and they trot over to it when the urge strikes them.  A lot of wrestling goes on, tails seem to be the preferred target.  Spanky who is still the smallest is very good at dragging his litter mates around by their tails.