Continuity: The cookie Calvin rubs all over his body only has raisins on the top left of the cookie. When the grandfather picks it up they are neatly in the center: not the same cookie.

Revealing: When the dad inserts the rectal thermometer into Calvin and he looks up, the CGI head is too obvious, especially when he is putting his head back down on the bed.

Continuity: When Calvin is sitting in the seat which has elastic ropes attached to it, he jumps forward to grab the grandfathers food. When he grabs the sausage, which is the last thing he eats, there is a slice of lemon on the plate, but when the grandfather looks down there is no slice of lemon. You can see this without stop motion, but it's much clearer when you do pause it.

Factual error: When Calvin is examined by the doctor, the doctor notes that he has a large scar on one side, possibly as a result of an appendectomy. The scar is 1) very sloppy; 2) pointing the wrong direction; and 3) on the wrong side of the abdomen for an appendectomy scar.

Continuity: When the old man is ready to eat some cookies in front of the TV, the total number of cookies changes from 5 to 6 between shots.

Visible crew/equipment: Early in the movie, in the scene where the 2 guys steal the large diamond, the 'little man' (who is black, and wearing black gloves) cuts a hole in the wood around the diamond, using power tools. In the shot where he replaces the wood (after taking the diamond), you can very see a white, gloveless hand in the bottom left (near the drill hole) is putting the piece back in place.