Continuity mistake: In the scene where Stanley and Zero are digging to find the chest toward the end of the movie, the background behind them is just a dirt wall. In a following shot upon discovering the box, there are stairs that lead to the hole. In the next shot, these stairs are gone again and it's just the hole again. (01:38:05)
Continuity mistake: In the scene where Madame Zeroni is explaining to Elya Yelnats about the curse that will be bestowed upon him if he doesn't carry her up the mountain after presenting the pig to Myra's father, her blouse is a blue button-up with gold stripes and no collar. Then the camera looks at Elya, and then back at Madame Zeroni. When it looks back at Madame Zeroni, you can see that her blouse is now a gold button-up with a collar.
Continuity mistake: When Mr. Sir gets angry at the boy who said, "What happened to your face?" he asks the campers if he looks good and you see D-Tent sitting in the upper left hand corner, everyone is sitting down. In the close up of D-Tent, X-Ray and Armpit are standing then. In the next shot with Mr. Sir, you see Armpit and X-Ray going to sit down. Then back to Mr. Sir, you see X-Ray standing. (01:01:05)
Continuity mistake: In the scene where Trout's gang burns the school and kills Sam, there is a part where Katherine runs into the sheriff's office then exits. A few seconds later, Katherine runs by a shop on which the name is reversed. Very obvious.
Continuity mistake: When Stanley is in the cafeteria for the first time, he walks over to the counter to get his food and he has a cup on his tray, when there is a close-up of his tray, the cup is gone. (00:13:00)
Continuity mistake: When we see Stanley after he has taken his shower and Mr. Sir is trying to shoot the lizard, Stanley is far away from his pile and close to Mr. Sir. In the very next shot, he is only a couple steps from his pile and farther from Mr. Sir than before. (00:25:10)
Continuity mistake: The cast even points this out on the commentary: At the camp, where the tents and cabins are, there are trees at times and sometimes there aren't.
Continuity mistake: Trout Walker has a gold tooth. In the scenes where he is wealthy it is on the left side of his mouth. In the scene where he is poor and dusty, pointing a gun at Kate, it on the right side of his mouth.
Continuity mistake: When Stanley finds the lipstick tube of K.B., X-Ray takes the tube then Stanley stops him. We see two angles (in front and behind) and Squid keeps changing his spot from left to right every time we see a new angle.
Continuity mistake: When Zero runs away we see Stanley touching his hat, but when the camera goes to a further angle we see Stanley not touching his hat. (01:11:00)
Continuity mistake: At the end part, when the kids at Camp Green Lake go dance in the rain, we see Zero looking up and his hair is in the air. In a different camera angle, his hair is put down by the rain. But when the camera returns to him looking up, his hair is up again.
Continuity mistake: When Stanley drives up in the bus, he sees Sam, and he fades away. At the same time, the bus window frame fades in, too.
Continuity mistake: When Mr. Pedanski is explaining Camp Green Lake to Stanley, X-Ray, Armpit, and Squid come. Then right before X-Ray says, "Go ahead Pit" there is a shot with Mr. Pedanski and Stanley and there are two boys walking together. Then when we see Stanley and Mr. Pedanski again they're gone only for one boy.
Continuity mistake: When Sam is being chased out into the lake there is some sort of ball right beside his boat when he gets shot, but when they shoot him the ball has disappeared.
Continuity mistake: When the boys are surprised that Zero talked we see Armpit and X-Ray. X-Ray is holding food, but in the next shot he's just making a fist. (00:13:55)
Continuity mistake: Near the beginning when Mr. Sir says "Those buzzards will pick you clean..." he is walking away from Stanley. When the camera angle changes, he starts to walk away again. (00:08:50)
Continuity mistake: At the beginning when Stanley is digging his first hole, he has gloves in some shots and doesn't in others. (Specifically when he's complaining about the other guys' dirt).
Continuity mistake: When we hear Stanley's voice reading the letter to his mother, we see Stanley getting food in the cafeteria. In all the different shots of his tray, the food and cup differ completely. (00:26:50)
Continuity mistake: After Zero asks "Did they have red X's on them?" we see Zero, Squid, and Armpit. Armpit is bent low over the table, but in the very next shot when he says "What else can you do," he is sitting up straight. (00:13:55)
Continuity mistake: In the scene at the end where the Yeltnats open the chest you can see Stanley's father with rubber gloves on, he takes his left glove off to look at the stock papers. You see him with his right glove on still, then Stanley takes one of the papers from his father and he doesn't have any gloves on, and in the next shot he has it back on his right hand.
Answer: He's eating a candy 'fruit' wedge. I remember him holding them when Stanley is first shown into his tent so I assume that he confiscated them from Stanley.