The letter read to Grandma is upper and lower case at first, but suddenly becomes written in all capital letters when seen through the goldfish bowl.
After the villain Dan (Jim Mason) is attacked by the Little Rascals at Grandma's house, he furiously destroys his damaged derby hat by putting his fist through it, and throws it away. But in the next shot when he leaves Grandma's house, he's holding a pristine straw hat in his hand.
The stunt double for Grandma adjusts Grandma's wig while Grandma is "warming up".
When Stymie is throwing big rocks up and they come down on his head. One clearly drops behind him and then fake rock is dropped on his head.
Grandma reads the children a serial story from a pulp magazine clearly marked "All Stories Complete".
After the kids finishing sawing the telephone pole and it starts to fall, they start to move away. As the camera moves out to a wide shot, the kids are all already standing far back from the pole as it falls.