Continuity mistake: When Donald opens the box of cigars and see a "Happy Birthday" card inside it, you can see his left hand is on the bottom left of the box, but in the next shot it is now on the bottom right.
Continuity mistake: When Donald finds the "To Uncle Donald" car in the box of cigars, the position of his fingers on the card change between shots.
Continuity mistake: When Huey, Dewey and Louie return to their home after buying the cigars, you can see that the wrapping paper is brown but when they are in the tree house, the paper is now light blue.
Continuity mistake: When Donald says "Let's see what you got!" when one of his nephews has taken the money box, the number of coins around him change between shots.
Continuity mistake: When two of Donald's nephews sneak out of the house after taking the money box, the clothes on the washing line beside them change between shots.
Continuity mistake: When Donald cuts off the string that one of his nephews has tied a coin onto, the coin falls into the money box. You can see that there is a slot on the box, but in the next shot it has disappeared.
Continuity mistake: When Donald presses the lever on the music box, he is holding the box with his left hand, but in the next shot it is in his right hand.
Continuity mistake: When Donald's three nephews run to the door, Donald is standing the door and he has a money box in his hand. You can see on the front of the box there is a green rectangle, but in the next shot the rectangle has changed to "Bank Huey Dewey Louie."
Continuity mistake: When one of Donald's nephews sees a box of cigars in the book he is looking at, you can see that above the box it reads "Smello Cigars." But when we see a close up of the page in the next shot, it now reads "La Smello Panatellas."
Continuity mistake: When Donald's three nephews are looking in their books for a birthday gift, you can see that there is a pink book with "Gifts" on the front cover, but a couple of shots later the book has disappeared.
Continuity mistake: When we first see the tree hut at the start of the cartoon, you can see there is nothing by the top left corner of the window, but when the camera pans in on the hut, a blue piece of paper has appeared.
