Mom checking e-mail, getting that "Jenny in accounting just had a baby" and finding out that she contributed with $35 for the diapers:

"Hey, I had twins two minutes ago, where's my diaper money?"

Mail fram Uncle Denny, you know, the guy who has to go to the dentist after eating his niece's cookies and demands that she pay part of his dentist bill:

"Stop baking for that grumpy old dude!"

Sometimes I log in in the middle of the night, and the family goes to bed. Unfortunately for them, collectibles appear at that time too, so I can drag a kid out of bed to get it, and when he's on his way back to bed, I find another collectible and say to the same kid:

"Good, you're up, get that coin before going to bed, will ya?"

Also, for those looking for interaction: drop adult on a kid, and the adult will tickle the kid and gets a giggle. Drop kid on kid, and all kids will run to their bedroom and have a giggle party, adorable. Another result of dropping kids on each other is that they "play train".