Panel 4: Robin can talk? But he's barely a year old; is that normal?
Panel 5: Oh, okay; it's going to be all about him saying no. Until, I guess, he says no to going inside.
Panel 7: Yep.
Panel 8: Oh, boo freakin' hoo.
Panel 9: And of course, you can't try to cheer him up or anything.
Panel 10: Ha, ha. That quip seems a bit advanced for Merrie, I think. Although she could be saying it in all seriousness. Like the anecdote I heard once about a kid her age or thereabouts, who was all excited to have a new sibling. The enthusiasm lasted right up until the new baby sister or brother started crying, at which point the older sibling said, "Daddy, can we send it back?"
Anyway, Mike, get bent. ETA: An' I forgot to mention that he even says "an'". Further proving his maturity.