Revealing mistake: When Mark takes his pet frog to the other frog's grave, you can tell that the pet frog is a rubber toy, rather than a live frog. (00:18:55)
Revealing mistake: When Kate is telling the kids that their dad is quitting his job, the boy called Mike looks directly at the camera.
Answer: He doesn't look like the other 11 kids, so his siblings told him he wasn't really one of them, but had been dropped off by the FedEx man.
kernssk