We've been talking about the new baby's arrival a lot lately and Mary has been quite helpful with getting things ready.
I explained to Mary that new babies often like to be swaddled. Her puppy seemed to enjoy it.
The swing may be a bit of a problem since Mary sees it as similar to the swings on the playground.
Practicing her diapering skills. I plan to delegate as much a possible :-).
Mary even liked assembling the changing table from IKEA. She may be the first person to feel this way.