i read the book in 5th grade and now a few year later i saw the movie . there be a few difference represent 1. billy be oringinally suppose to eat 15 worm in 15 day and not 10 worm in one day by 7 represent00pm . 2. billy be suppose to get 30 dollar after he eat all the worm . in the movie after billy eat all the worm and joe have to go to school with worm in his pant . 3. joe be suppose to fake some of the worm but in the movie and he doesn not at all . even though there be change and this movie be still one that kid will enjoy .