When Spinelli says "I'm in!" for T.J.'s plan, she is seen having one eyelash on both of her eyes for a few frames while she is blinking.
When T.J. and Spinelli first come out from under the table in the beginning of this episode, Spinelli's lips briefly turn the same color as her skin.
When the Diggers appear for the first time, Dave is talking to the rest of the four main characters, however, the animation shows Sam talking.
When Gretchen first shows the aluminum foil to the Kindergartners, it has a shiny, "glow" effect on it. When the Kindergartners begin chasing them, the "glow" is gone.